From matfall94 at gmail.com  Tue Jun  4 04:21:51 2019
From: matfall94 at gmail.com (matar fall)
Date: Tue, 4 Jun 2019 10:21:51 +0200
Subject: [Flask] Question of outsourcing flask app
Message-ID: <CAF+TJhhEX+BuM+0hSuQ6SHvZhB9To9y2hxkniqXCP9yaWo1Exw@mail.gmail.com>

Hello,
I have a question about flask application.
Is it possible to externalize the configuration of a flask application
thanks to a link?
Like I give my link www.test.fr/config.py or something like that as source
of my flask configuration.
Best regards.

-- 

*Cordialement.*


*Matar FALL*

*Etudiant en Machine Learning for Data Science ? l'Universit? Paris
Descartes*

*Tel: +33 07 51 53 95 18*
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From casahome2000 at gmail.com  Tue Jun  4 09:06:31 2019
From: casahome2000 at gmail.com (Carlos Anchia)
Date: Tue, 4 Jun 2019 08:06:31 -0500
Subject: [Flask] Question of outsourcing flask app
In-Reply-To: <CAF+TJhhEX+BuM+0hSuQ6SHvZhB9To9y2hxkniqXCP9yaWo1Exw@mail.gmail.com>
References: <CAF+TJhhEX+BuM+0hSuQ6SHvZhB9To9y2hxkniqXCP9yaWo1Exw@mail.gmail.com>
Message-ID: <55A0F33D-8869-47CC-9746-383CC3654BB0@gmail.com>

Depends?

"The way Flask is designed usually requires the configuration to be available when the application starts up.?
http://flask.pocoo.org/docs/1.0/config/ <http://flask.pocoo.org/docs/1.0/config/>

If this is a goal, I would think there would need to be a script to pull the latest config from the URL, then launch the Flask Application pointing to the updated config.py.

The issue here is that changes to the config.py file (at the URL) would not update the config of the running flask app (at runtime).




> On Jun 4, 2019, at 3:21 AM, matar fall <matfall94 at gmail.com> wrote:
> 
> Hello,
> I have a question about flask application.
> Is it possible to externalize the configuration of a flask application thanks to a link?
> Like I give my link www.test.fr/config.py <http://www.test.fr/config.py> or something like that as source of my flask configuration.
> Best regards.
> 
> -- 
> Cordialement.
> 
> Matar FALL
> Etudiant en Machine Learning for Data Science ? l'Universit? Paris Descartes
> Tel: +33 07 51 53 95 18
> 
> _______________________________________________
> Flask mailing list
> Flask at python.org
> https://mail.python.org/mailman/listinfo/flask

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From badrihippo at gmail.com  Tue Jun  4 09:11:16 2019
From: badrihippo at gmail.com (Hippo)
Date: Tue, 4 Jun 2019 18:41:16 +0530
Subject: [Flask] Question of outsourcing flask app
In-Reply-To: <55A0F33D-8869-47CC-9746-383CC3654BB0@gmail.com>
References: <CAF+TJhhEX+BuM+0hSuQ6SHvZhB9To9y2hxkniqXCP9yaWo1Exw@mail.gmail.com>
 <55A0F33D-8869-47CC-9746-383CC3654BB0@gmail.com>
Message-ID: <CAO6nOq4Dra0P=7aHCjeT=WthnhQ2RcqV-CjSHveU-6aVfHmp-g@mail.gmail.com>

Why do you want to externalise the configuration? In other words, what are
the settings that you plan to modify in the external file?

Depending on what it is, you could code your application to automatically
load the settings whenever it needs to, during runtime, instead of having
to get it from the config file. (Of course, if it's something major then
Carlos' suggestion of having a separate launch script would work better.
Depends on what you're trying to do).

?Badri
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From matfall94 at gmail.com  Tue Jun  4 09:51:11 2019
From: matfall94 at gmail.com (matar fall)
Date: Tue, 4 Jun 2019 15:51:11 +0200
Subject: [Flask] Question of outsourcing flask app
In-Reply-To: <CAO6nOq4Dra0P=7aHCjeT=WthnhQ2RcqV-CjSHveU-6aVfHmp-g@mail.gmail.com>
References: <CAF+TJhhEX+BuM+0hSuQ6SHvZhB9To9y2hxkniqXCP9yaWo1Exw@mail.gmail.com>
 <55A0F33D-8869-47CC-9746-383CC3654BB0@gmail.com>
 <CAO6nOq4Dra0P=7aHCjeT=WthnhQ2RcqV-CjSHveU-6aVfHmp-g@mail.gmail.com>
Message-ID: <CAF+TJhgtgeKXAoFicUBq3Ua+vbnSvXNgE=n0AQ_uOWzXz=ur_A@mail.gmail.com>

Got It.
Thank for your reply.
It is necessary for me to do this kind of configuration if it is possible.
Suggestion of Carlos is a nice idea which I will check/explore.
Thank You. Regards

Le mar. 4 juin 2019 ? 15:11, Hippo <badrihippo at gmail.com> a ?crit :

> Why do you want to externalise the configuration? In other words, what are
> the settings that you plan to modify in the external file?
>
> Depending on what it is, you could code your application to automatically
> load the settings whenever it needs to, during runtime, instead of having
> to get it from the config file. (Of course, if it's something major then
> Carlos' suggestion of having a separate launch script would work better.
> Depends on what you're trying to do).
>
> ?Badri
>


-- 

*Cordialement.*


*Matar FALL*

*Etudiant en Machine Learning for Data Science ? l'Universit? Paris
Descartes*

*Tel: +33 07 51 53 95 18*
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From paradox2005 at gmail.com  Tue Jun  4 10:30:57 2019
From: paradox2005 at gmail.com (Adil Hasan)
Date: Tue, 4 Jun 2019 15:30:57 +0100
Subject: [Flask] Question of outsourcing flask app
In-Reply-To: <CAF+TJhgtgeKXAoFicUBq3Ua+vbnSvXNgE=n0AQ_uOWzXz=ur_A@mail.gmail.com>
References: <CAF+TJhhEX+BuM+0hSuQ6SHvZhB9To9y2hxkniqXCP9yaWo1Exw@mail.gmail.com>
 <55A0F33D-8869-47CC-9746-383CC3654BB0@gmail.com>
 <CAO6nOq4Dra0P=7aHCjeT=WthnhQ2RcqV-CjSHveU-6aVfHmp-g@mail.gmail.com>
 <CAF+TJhgtgeKXAoFicUBq3Ua+vbnSvXNgE=n0AQ_uOWzXz=ur_A@mail.gmail.com>
Message-ID: <20190604143056.GC3622@parsnip>

Hello,
I think that perhaps reading configs from remote resources could
potentially be a security issue. If you can make sure that the site
providing the configs also has to provide some token that may help to
mitigate the issue.
hth
adil

On Tue, Jun 04, 2019 at 03:51:11PM +0200, matar fall wrote:
> Got It.
> Thank for your reply.
> It is necessary for me to do this kind of configuration if it is possible.
> Suggestion of Carlos is a nice idea which I will check/explore.
> Thank You. Regards
> 
> Le mar. 4 juin 2019 ? 15:11, Hippo <badrihippo at gmail.com> a ?crit :
> 
> > Why do you want to externalise the configuration? In other words, what are
> > the settings that you plan to modify in the external file?
> >
> > Depending on what it is, you could code your application to automatically
> > load the settings whenever it needs to, during runtime, instead of having
> > to get it from the config file. (Of course, if it's something major then
> > Carlos' suggestion of having a separate launch script would work better.
> > Depends on what you're trying to do).
> >
> > ?Badri
> >
> 
> 
> -- 
> 
> *Cordialement.*
> 
> 
> *Matar FALL*
> 
> *Etudiant en Machine Learning for Data Science ? l'Universit? Paris
> Descartes*
> 
> *Tel: +33 07 51 53 95 18*

> _______________________________________________
> Flask mailing list
> Flask at python.org
> https://mail.python.org/mailman/listinfo/flask


From keith at the-sanctuary.biz  Tue Jun  4 13:10:18 2019
From: keith at the-sanctuary.biz (keith macdonald)
Date: Tue, 4 Jun 2019 18:10:18 +0100
Subject: [Flask] Question of outsourcing flask app
In-Reply-To: <mailman.44.1559664003.30467.flask@python.org>
References: <mailman.44.1559664003.30467.flask@python.org>
Message-ID: <001301d51af8$62e564f0$28b02ed0$@biz>

I agree with Adil about the security risk - how would you know what's in the
remote file *before* it gets used?

But, if you must go that route, how about running a Curl command from inside
the Python code, just before the Flask app is initialized? With the Curl
program saving the file to somewhere local.

For example:

# get remote file
import os
cmd = "C:/Curl/curl.exe www.test.fr/config.py -o C:/Download/config.py
# or (instead of a Download folder) whatever folder is good for the local
code.
os.system(cmd)

# now start Flask app
import config as config
from flask import Flask
app = Flask(__name__)


From matfall94 at gmail.com  Tue Jun  4 14:50:35 2019
From: matfall94 at gmail.com (matar fall)
Date: Tue, 4 Jun 2019 20:50:35 +0200
Subject: [Flask] Question of outsourcing flask app
In-Reply-To: <001301d51af8$62e564f0$28b02ed0$@biz>
References: <mailman.44.1559664003.30467.flask@python.org>
 <001301d51af8$62e564f0$28b02ed0$@biz>
Message-ID: <CAF+TJhi0tS4jQUoV28+A-nnVn6hZOyxCUPMYVN8+KX0+JkJ3OQ@mail.gmail.com>

Got it.
Thank You for sharing your knowledge.
I will handle and take into account all your suggestions.
Regards.

Le mar. 4 juin 2019 ? 19:35, keith macdonald <keith at the-sanctuary.biz> a
?crit :

> I agree with Adil about the security risk - how would you know what's in
> the
> remote file *before* it gets used?
>
> But, if you must go that route, how about running a Curl command from
> inside
> the Python code, just before the Flask app is initialized? With the Curl
> program saving the file to somewhere local.
>
> For example:
>
> # get remote file
> import os
> cmd = "C:/Curl/curl.exe www.test.fr/config.py -o C:/Download/config.py
> # or (instead of a Download folder) whatever folder is good for the local
> code.
> os.system(cmd)
>
> # now start Flask app
> import config as config
> from flask import Flask
> app = Flask(__name__)
>
> _______________________________________________
> Flask mailing list
> Flask at python.org
> https://mail.python.org/mailman/listinfo/flask
>
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From coreybrett at gmail.com  Tue Jun  4 15:38:32 2019
From: coreybrett at gmail.com (Corey Boyle)
Date: Tue, 4 Jun 2019 15:38:32 -0400
Subject: [Flask] combing decorators
Message-ID: <CAD=ssw31MUFYWwFHSfFjiyVDC1KX1M+5g=a-u6RD9j8A26Sdfw@mail.gmail.com>

I need to create a new decorator for my views to handle different users
having different roles/access levels.

Something like this...
@role_required('SALES')


So my views would end up something like this...
@blueprint.route('/post')
@login_required
@role_required(['SALES'])
def post():
    pass

Is there any way for me to combine those decorators?
Maybe something like...
@view('/post', ['SALES'])
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From cs at cskk.id.au  Tue Jun  4 17:31:36 2019
From: cs at cskk.id.au (Cameron Simpson)
Date: Wed, 5 Jun 2019 07:31:36 +1000
Subject: [Flask] combing decorators
In-Reply-To: <CAD=ssw31MUFYWwFHSfFjiyVDC1KX1M+5g=a-u6RD9j8A26Sdfw@mail.gmail.com>
References: <CAD=ssw31MUFYWwFHSfFjiyVDC1KX1M+5g=a-u6RD9j8A26Sdfw@mail.gmail.com>
Message-ID: <20190604213136.GA27974@cskk.homeip.net>

On 04Jun2019 15:38, Corey Boyle <coreybrett at gmail.com> wrote:
>I need to create a new decorator for my views to handle different users
>having different roles/access levels.
>
>Something like this...
>@role_required('SALES')

I'm doing roughly this, though at present there's just one logged in 
role for my app.

>So my views would end up something like this...
>@blueprint.route('/post')
>@login_required
>@role_required(['SALES'])
>def post():
>    pass
>
>Is there any way for me to combine those decorators?
>Maybe something like...
>@view('/post', ['SALES'])

Sure. You just need to ensure that app.route is the outermost decorator 
so that it attaches your other-decorated handler to the route.

I've a @post_route decorator in my current app which intercepts 
particular form fields, looks them up, and presents the lookups as 
parameters, and this is common enough to do exactly what you're 
describing: wrap app.route and other things into a single decorator.  
Works a treat.

Start with this:

  def view(route, roles, **kw):
    def decorate(handler):
      return blueprint.route(route,**kw)(
               login_required(
                 role_required(roles)(
                   handler)))
    return decorate

That's untested, but you see the structure I presume.

Cheers,
Cameron Simpson <cs at cskk.id.au>

From cs at cskk.id.au  Tue Jun  4 17:35:33 2019
From: cs at cskk.id.au (Cameron Simpson)
Date: Wed, 5 Jun 2019 07:35:33 +1000
Subject: [Flask] Question of outsourcing flask app
In-Reply-To: <20190604143056.GC3622@parsnip>
References: <20190604143056.GC3622@parsnip>
Message-ID: <20190604213533.GA68570@cskk.homeip.net>

On 04Jun2019 15:30, Adil Hasan <paradox2005 at gmail.com> wrote:
>I think that perhaps reading configs from remote resources could
>potentially be a security issue.

I was thinking that too.

>If you can make sure that the site
>providing the configs also has to provide some token that may help to
>mitigate the issue.

That sounds like a good idea.

Some years ago we had to support an app which had to read a SOAP 
specification from a URL (limitation of their SOAP library), and we went 
to the effort of providing an internal static web server whose whole 
purpose was to provide that URL. The app still fetched a URL, but it was 
wired to fetch it from a totally internal resource.

Cheers,
Cameron Simpson <cs at cskk.id.au>

>adil
>
>On Tue, Jun 04, 2019 at 03:51:11PM +0200, matar fall wrote:
>> Got It.
>> Thank for your reply.
>> It is necessary for me to do this kind of configuration if it is possible.
>> Suggestion of Carlos is a nice idea which I will check/explore.
>> Thank You. Regards
>>
>> Le mar. 4 juin 2019 ? 15:11, Hippo <badrihippo at gmail.com> a ?crit :
>>
>> > Why do you want to externalise the configuration? In other words, what are
>> > the settings that you plan to modify in the external file?
>> >
>> > Depending on what it is, you could code your application to automatically
>> > load the settings whenever it needs to, during runtime, instead of having
>> > to get it from the config file. (Of course, if it's something major then
>> > Carlos' suggestion of having a separate launch script would work better.
>> > Depends on what you're trying to do).
>> >
>> > ?Badri
>> *Cordialement.*
>> *Matar FALL*
>> *Etudiant en Machine Learning for Data Science ? l'Universit? Paris
>> Descartes*
>> *Tel: +33 07 51 53 95 18*

From gergely at polonkai.eu  Wed Jun  5 00:34:47 2019
From: gergely at polonkai.eu (Gergely Polonkai)
Date: Wed, 5 Jun 2019 06:34:47 +0200
Subject: [Flask] Question of outsourcing flask app
In-Reply-To: <CAF+TJhi0tS4jQUoV28+A-nnVn6hZOyxCUPMYVN8+KX0+JkJ3OQ@mail.gmail.com>
References: <mailman.44.1559664003.30467.flask@python.org>
 <001301d51af8$62e564f0$28b02ed0$@biz>
 <CAF+TJhi0tS4jQUoV28+A-nnVn6hZOyxCUPMYVN8+KX0+JkJ3OQ@mail.gmail.com>
Message-ID: <CACczBUJRy9t0PZdEL+wgj2Co6dLwj7D_MG1j+6FJHDm6d0FqNQ@mail.gmail.com>

Hello,

what you outline is not a terrible idea, and not too hard to code. However,
there are a lot of pitfalls, some of which were mentioned by others.

First, you should download the config before you initialise your app. This
isn?t hard, you can do it with external commands like proposed before, or a
few lines of Python using the http or requests (and a lot more) libraries.

When you have your file, you should check its integrity. Is this file what
it claims to be? Was this file generated by a trusted party? You may ask
the people who generate the file to cryptographically sign it so you can
check it before deploying it. If the signature is not good, you can fall
back to a previous, good file. All this is especially true if you download
this file from a service on an external network so you can avoid man in the
middle attacks.

Now that you know you can trust the file, you should still check for other
errors. We?re all humans and as such, make mistakes. The file might have
syntax errors, conflicting configuration options like ?turn on caching? but
without a cache backend set, or the likes.

And finally, you can fire up your app!

Happy Coding!

Gergely

On Tue, 4 Jun 2019, 20:51 matar fall, <matfall94 at gmail.com> wrote:

> Got it.
> Thank You for sharing your knowledge.
> I will handle and take into account all your suggestions.
> Regards.
>
> Le mar. 4 juin 2019 ? 19:35, keith macdonald <keith at the-sanctuary.biz> a
> ?crit :
>
>> I agree with Adil about the security risk - how would you know what's in
>> the
>> remote file *before* it gets used?
>>
>> But, if you must go that route, how about running a Curl command from
>> inside
>> the Python code, just before the Flask app is initialized? With the Curl
>> program saving the file to somewhere local.
>>
>> For example:
>>
>> # get remote file
>> import os
>> cmd = "C:/Curl/curl.exe www.test.fr/config.py -o C:/Download/config.py
>> # or (instead of a Download folder) whatever folder is good for the local
>> code.
>> os.system(cmd)
>>
>> # now start Flask app
>> import config as config
>> from flask import Flask
>> app = Flask(__name__)
>>
>> _______________________________________________
>> Flask mailing list
>> Flask at python.org
>> https://mail.python.org/mailman/listinfo/flask
>>
> _______________________________________________
> Flask mailing list
> Flask at python.org
> https://mail.python.org/mailman/listinfo/flask
>
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From ar at zeit.io  Mon Jun 10 08:32:40 2019
From: ar at zeit.io (Arup Rakshit)
Date: Mon, 10 Jun 2019 18:02:40 +0530
Subject: [Flask] pytest code from flask official tut "with" vs "no with"
 block
Message-ID: <F087A3E1-FEB6-4D77-A6DB-D9D3EFB8793A@zeit.io>

Hi,

In this piece of code:

def test_login(client, auth):
    assert client.get('/auth/login').status_code == 200
    response = auth.login()
    assert response.headers['Location'] == 'http://localhost/'

    with client:
        client.get('/?) # 1
        assert session['user_id'] == 1 # 2
        assert g.user['username'] == ?test? # 3

Why #1, #2 and #3 is wrapped into the with block, instead of writing them normally like:

client.get('/')
assert session['user_id'] == 1
assert g.user['username'] == 'test'

I found the code from https://github.com/pallets/flask/blob/master/examples/tutorial/tests/test_auth.py#L67 


Thanks,

Arup Rakshit
ar at zeit.io




From badrihippo at gmail.com  Mon Jun 10 08:37:47 2019
From: badrihippo at gmail.com (Hippo)
Date: Mon, 10 Jun 2019 18:07:47 +0530
Subject: [Flask] pytest code from flask official tut "with" vs "no with"
 block
In-Reply-To: <F087A3E1-FEB6-4D77-A6DB-D9D3EFB8793A@zeit.io>
References: <F087A3E1-FEB6-4D77-A6DB-D9D3EFB8793A@zeit.io>
Message-ID: <CAO6nOq7PSumWcVATSSxKeqhG358k1DgWsXPAJtm_uAx4R2nd2A@mail.gmail.com>

Not sure about this case, but they usually use "with" when the object needs
to be disabled or something after the block. For example, you'd use "with
open('filename.txt', 'w') as file:" so that the file automatically gets
closed after the "with" block is over.

I'm guessing "client" works in a similar fashion. (Someone else could
confirm: I'm a bit busy to investigate right now, sorry).

~Badri

On Mon, 10 Jun 2019 at 18:03, Arup Rakshit <ar at zeit.io> wrote:

> Hi,
>
> In this piece of code:
>
> def test_login(client, auth):
>     assert client.get('/auth/login').status_code == 200
>     response = auth.login()
>     assert response.headers['Location'] == 'http://localhost/'
>
>     with client:
>         client.get('/?) # 1
>         assert session['user_id'] == 1 # 2
>         assert g.user['username'] == ?test? # 3
>
> Why #1, #2 and #3 is wrapped into the with block, instead of writing them
> normally like:
>
> client.get('/')
> assert session['user_id'] == 1
> assert g.user['username'] == 'test'
>
> I found the code from
> https://github.com/pallets/flask/blob/master/examples/tutorial/tests/test_auth.py#L67
>
>
> Thanks,
>
> Arup Rakshit
> ar at zeit.io
>
>
>
> _______________________________________________
> Flask mailing list
> Flask at python.org
> https://mail.python.org/mailman/listinfo/flask
>
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From harish77kumar4270 at gmail.com  Mon Jun 10 13:28:13 2019
From: harish77kumar4270 at gmail.com (Harish Kumar)
Date: Mon, 10 Jun 2019 22:58:13 +0530
Subject: [Flask] pytest code from flask official tut "with" vs "no with"
 block
In-Reply-To: <F087A3E1-FEB6-4D77-A6DB-D9D3EFB8793A@zeit.io>
References: <F087A3E1-FEB6-4D77-A6DB-D9D3EFB8793A@zeit.io>
Message-ID: <CABirOesAHG25S11cQn6bR7EO6g671VgWT4pBS3D3UHOrx8HZsA@mail.gmail.com>

Hi Community folks

I need a small help.

We at https://quantamixsolutions.com/home developed a full-fledged social
media platform in Flask but we had a hard time to integrate analytics from
social media data like there are WordPress plugins.

I was trying to integrate WordPress API in python which is available. Has
anyone tried this before?

https://pypi.org/project/wordpress-api/

The website for Quantamix Solutions is also based in python Flask.

How to find more information as if one would like to rate one's website
with other similar Flask based websites.

Best regards,
Harish




On Mon, Jun 10, 2019 at 6:03 PM Arup Rakshit <ar at zeit.io> wrote:

> Hi,
>
> In this piece of code:
>
> def test_login(client, auth):
>     assert client.get('/auth/login').status_code == 200
>     response = auth.login()
>     assert response.headers['Location'] == 'http://localhost/'
>
>     with client:
>         client.get('/?) # 1
>         assert session['user_id'] == 1 # 2
>         assert g.user['username'] == ?test? # 3
>
> Why #1, #2 and #3 is wrapped into the with block, instead of writing them
> normally like:
>
> client.get('/')
> assert session['user_id'] == 1
> assert g.user['username'] == 'test'
>
> I found the code from
> https://github.com/pallets/flask/blob/master/examples/tutorial/tests/test_auth.py#L67
>
>
> Thanks,
>
> Arup Rakshit
> ar at zeit.io
>
>
>
> _______________________________________________
> Flask mailing list
> Flask at python.org
> https://mail.python.org/mailman/listinfo/flask
>


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From ar at zeit.io  Mon Jun 10 14:42:45 2019
From: ar at zeit.io (Arup Rakshit)
Date: Tue, 11 Jun 2019 00:12:45 +0530
Subject: [Flask] pytest code from flask official tut "with" vs "no with"
 block
In-Reply-To: <CABirOesAHG25S11cQn6bR7EO6g671VgWT4pBS3D3UHOrx8HZsA@mail.gmail.com>
References: <F087A3E1-FEB6-4D77-A6DB-D9D3EFB8793A@zeit.io>
 <CABirOesAHG25S11cQn6bR7EO6g671VgWT4pBS3D3UHOrx8HZsA@mail.gmail.com>
Message-ID: <47E94232-202C-43DA-97F9-DBD251B31C2C@zeit.io>


Do not hijack others post, else create your own post.


Thanks,

Arup Rakshit
ar at zeit.io



> On 10-Jun-2019, at 10:58 PM, Harish Kumar <harish77kumar4270 at gmail.com> wrote:
> 
> Hi Community folks 
> 
> I need a small help. 
> 
> We at https://quantamixsolutions.com/home developed a full-fledged social media platform in Flask but we had a hard time to integrate analytics from social media data like there are WordPress plugins. 
> 
> I was trying to integrate WordPress API in python which is available. Has anyone tried this before?
> 
> https://pypi.org/project/wordpress-api/
> 
> The website for Quantamix Solutions is also based in python Flask. 
> 
> How to find more information as if one would like to rate one's website with other similar Flask based websites. 
> 
> Best regards, 
> Harish 
> 
> 
> 
> 
> On Mon, Jun 10, 2019 at 6:03 PM Arup Rakshit <ar at zeit.io> wrote:
> Hi,
> 
> In this piece of code:
> 
> def test_login(client, auth):
>     assert client.get('/auth/login').status_code == 200
>     response = auth.login()
>     assert response.headers['Location'] == 'http://localhost/'
> 
>     with client:
>         client.get('/?) # 1
>         assert session['user_id'] == 1 # 2
>         assert g.user['username'] == ?test? # 3
> 
> Why #1, #2 and #3 is wrapped into the with block, instead of writing them normally like:
> 
> client.get('/')
> assert session['user_id'] == 1
> assert g.user['username'] == 'test'
> 
> I found the code from https://github.com/pallets/flask/blob/master/examples/tutorial/tests/test_auth.py#L67 
> 
> 
> Thanks,
> 
> Arup Rakshit
> ar at zeit.io
> 
> 
> 
> _______________________________________________
> Flask mailing list
> Flask at python.org
> https://mail.python.org/mailman/listinfo/flask
> 
> 
> -- 
>  
>  


From ar at zeit.io  Wed Jun 12 16:31:29 2019
From: ar at zeit.io (Arup Rakshit)
Date: Thu, 13 Jun 2019 02:01:29 +0530
Subject: [Flask] Flask RuntimeError: Working outside of application context.
Message-ID: <33569EB0-FB17-4904-BD7E-54DA1B310CA7@zeit.io>

Hello All,

I have the following factory function.

from flask import Flask, jsonify
import os
import pprint


def create_app(test_config=None):
    """Create and configure an instance of the Flask application."""
    app = Flask(__name__, instance_relative_config=True)

    app.config.from_mapping(
        # a default secret that should be overridden by instance config
        SECRET_KEY="dev",
        # store the database in the instance folder
        DATABASE="awesome_recipes_dev",
    )

    if test_config is None:
        # load the instance config, if it exists, when not testing
        app.config.from_pyfile("config.py", silent=True)
    else:
        # load the test config if passed in
        app.config.update(test_config)

    # ensure the instance folder exists
    try:
        os.makedirs(app.instance_path)
    except OSError:
        pass

    from app import db

    db.init_app(app)

    @app.shell_context_processor
    def shell_context():
        from app.models.recipe import Recipe

        return {
            "app": app,
            "db": db.get_db(),
            "pp": pprint.PrettyPrinter(indent=4).pprint,
            "Recipe": Recipe,
        }

    @app.route("/")
    def index():
        return jsonify({"hello": "World"})

    from .recipes.views import recipes_blueprint

    app.register_blueprint(recipes_blueprint)

    return app

Now when I run flask shell I get error:

Traceback (most recent call last):
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/bin/flask", line 11, in <module>
    sys.exit(main())
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/flask/cli.py", line 906, in main
    cli.main(args=args, prog_name=name)
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/flask/cli.py", line 569, in main
    return super(FlaskGroup, self).main(*args, **kwargs)
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/click/core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/flask/cli.py", line 418, in decorator
    with __ctx.ensure_object(ScriptInfo).load_app().app_context():
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/flask/cli.py", line 381, in load_app
    app = locate_app(self, import_name, name)
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/flask/cli.py", line 255, in locate_app
    return find_best_app(script_info, module)
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/flask/cli.py", line 77, in find_best_app
    app = call_factory(script_info, app_factory)
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/flask/cli.py", line 117, in call_factory
    return app_factory()
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/app/__init__.py", line 49, in create_app
    from .recipes.views import recipes_blueprint
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/app/recipes/views.py", line 3, in <module>
    from ..models.recipe import Recipe
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/app/models/recipe.py", line 4, in <module>
    class Recipe:
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/app/models/recipe.py", line 6, in Recipe
    __db__ = get_db()
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/app/db.py", line 22, in get_db
    if "db" not in g:
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/werkzeug/local.py", line 380, in <lambda>
    __contains__ = lambda x, i: i in x._get_current_object()
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/werkzeug/local.py", line 307, in _get_current_object
    return self.__local()
  File "/Users/aruprakshit/Code/flask/awesome_recipes/backend/venv/lib/python3.7/site-packages/flask/globals.py", line 44, in _lookup_app_object
    raise RuntimeError(_app_ctx_err_msg)
RuntimeError: Working outside of application context.

I am not able to figure out where I need to push the app context to make it work. Can anyone help me? 

My code is https://gitlab.com/aruprakshit/flask_awesome_recipes/tree/master/app 

Thanks,

Arup Rakshit
ar at zeit.io




From coreybrett at gmail.com  Sat Jun 15 09:40:55 2019
From: coreybrett at gmail.com (Corey Boyle)
Date: Sat, 15 Jun 2019 09:40:55 -0400
Subject: [Flask] Flask-Login / multiple auth backends
Message-ID: <CAD=ssw2KaNysaah8GZ5VqcWqRf5HkdfJGag+auiibSO0C4rWHg@mail.gmail.com>

Has anyone ever done different logins for different Blueprints?

I have a site which is mostly public, except one Blueprint that requires
authentication using Flask-Login which uses LDAP as the backend.

Now I would like to add another Blueprint that uses a traditional
registration based setup.

How could I configure Flask-Login to work for both?
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From savageapple850 at gmail.com  Tue Jun 18 02:28:03 2019
From: savageapple850 at gmail.com (Cravan)
Date: Tue, 18 Jun 2019 14:28:03 +0800
Subject: [Flask] Flask app syntax error
Message-ID: <279A41A8-642C-4612-96F7-ABDB26B04045@gmail.com>

I'm setting up a flask app variable, but app throws up a syntax error. Can someone please help thanks. I literally can't tell whats wrong, and have already looked out for any forgotten brackets and spacing, but I might be wrong haha

 

````

import os

import sqlalchemy

from flask import Flask, render_template, request, session, redirect, url_for, escape

from flask_session import Session

from sqlalchemy import create_engine

engine = create_engine(os.getenv("DATABASE_URL")

app = Flask(__name__)

@app.route("/")

def index():

??? movies = engine.execute("SELECT * FROM movies").fetchall()

??? return render_template("index.html", movies=movies)

````

 

````

#####################

Traceback (most recent call last):

? File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/flask/cli.

py", line 332, in __call__

??? self._flush_bg_loading_exception()

? File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/flask/cli.

py", line 320, in _flush_bg_loading_exception

??? reraise(*exc_info)

? File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/flask/_com

pat.py", line 36, in reraise

??? raise value

? File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/flask/cli.

py", line 309, in _load_app

??? self._load_unlocked()

? File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/flask/cli.

py", line 324, in _load_unlocked

self._app = rv = self.loader()

? File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/flask/cli.

py", line 381, in load_app

??? app = locate_app(self, import_name, name)

? File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/flask/cli.

py", line 236, in locate_app

??? __import__(module_name)

File "/Users/CPZ/Desktop/cepsummative3/main.py", line 7

??? app = Flask(__name__)

????? ^

SyntaxError: invalid syntax

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From matthew at jrgnsn.net  Tue Jun 18 02:32:08 2019
From: matthew at jrgnsn.net (Matthew Jorgensen)
Date: Tue, 18 Jun 2019 01:32:08 -0500
Subject: [Flask] Flask app syntax error
In-Reply-To: <279A41A8-642C-4612-96F7-ABDB26B04045@gmail.com>
References: <279A41A8-642C-4612-96F7-ABDB26B04045@gmail.com>
Message-ID: <B4D12F59-3792-4D23-A316-CB47C6DEB175@jrgnsn.net>


> On Jun 18, 2019, at 01:28, Cravan <savageapple850 at gmail.com> wrote:
> 
> engine = create_engine(os.getenv("DATABASE_URL")


This needs the second closing parenthesis. 

`engine = create_engine(os.getenv("DATABASE_URL"))`

Matthew


From imonikemohammed at gmail.com  Tue Jun 18 12:01:32 2019
From: imonikemohammed at gmail.com (Abdul Mohammed)
Date: Tue, 18 Jun 2019 17:01:32 +0100
Subject: [Flask] Can't get Werkzeug check_password_hash method to work
Message-ID: <CAEKkz86pk_662dsYoZ+Rsw3mz6+d9PY91r0f=+j2A0ex-BSkJg@mail.gmail.com>

I am trying to learn to use the Flask framework. I am trying to implement
Werkzeug's password hashing and running into problems. My code looks like
this:

...from flask import render_template,request,jsonify, url_for,
flashfrom flask_login import login_required, login_userfrom models
import Userfrom auth.forms import LoginForm...
@app.route('/',methods=['GET','POST'])def index():
    form = LoginForm()
    if form.validate_on_submit():
        user = User.query.filter_by(email=form.email.data).first()
        if user is not None and user.check_password(form.password.data):
            login_user(user, form.remember_me.data)
            return redirect(request.args.get('next') or url_for('dashboard'))
        flash('Invalid username or password.')
    return render_template('auth/login.html', form=form)

I have confirmed that the query successfully returns the user. It is at
the very next line that program execution stops. Since I am sure that
the user is returned from the database, it seems my implementation of
the check_password
 function is causing the problem. My Model looks like this:

from flask_login import UserMixinfrom flask_login import
LoginManagerfrom dbobject import dbfrom werkzeug.security import
generate_password_hash, check_password_hash

login_manager = LoginManager()

class User(UserMixin, db.Model):
    __tablename__ = 'users'
    id = db.Column(db.Integer, primary_key = True)
    email = db.Column(db.String(64), unique=True, index=True)
    username = db.Column(db.String(64), unique=True, index=True)
    password_hash = db.Column(db.String(128))

    @login_manager.user_loader
    def load_user(user_id):
       return User.query.get(int(user_id))

    def set_password(self, password):
       self.password_hash = generate_password_hash(password)

    def check_password(self, password):
       return check_password_hash(self.password_hash, password)


The app is running off a MySQL database and I used the MySQL Password()
function to generate the password hashes stored in the database. Please
can anyone give me pointers to what I might be doing wrong?
Thank you.
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From ziirish at ziirish.info  Tue Jun 18 12:14:19 2019
From: ziirish at ziirish.info (Ziirish)
Date: Tue, 18 Jun 2019 18:14:19 +0200
Subject: [Flask] Can't get Werkzeug check_password_hash method to work
In-Reply-To: <CAEKkz86pk_662dsYoZ+Rsw3mz6+d9PY91r0f=+j2A0ex-BSkJg@mail.gmail.com>
References: <CAEKkz86pk_662dsYoZ+Rsw3mz6+d9PY91r0f=+j2A0ex-BSkJg@mail.gmail.com>
Message-ID: <20190618161418.4rjaejhnsn2kbw33@mail.ziirish.info>

* On Tuesday, June 18, 2019 at 05:01 PM +0100, Abdul Mohammed <imonikemohammed at gmail.com> wrote:
> 
>     def set_password(self, password):
>        self.password_hash = generate_password_hash(password)
> 
>     def check_password(self, password):
>        return check_password_hash(self.password_hash, password)
> 
> 
> The app is running off a MySQL database and I used the MySQL Password()
> function to generate the password hashes stored in the database. Please
> can anyone give me pointers to what I might be doing wrong?

So you mean the password_hash value has actually not been initialized with
generate_password_hash?
That would explain why check_password_hash() doesn't work, because MySQL
Password() function and generate_password_hash() don't return the same thing.

From imonikemohammed at gmail.com  Tue Jun 18 12:27:26 2019
From: imonikemohammed at gmail.com (Abdul Mohammed)
Date: Tue, 18 Jun 2019 17:27:26 +0100
Subject: [Flask] Can't get Werkzeug check_password_hash method to work
In-Reply-To: <20190618161418.4rjaejhnsn2kbw33@mail.ziirish.info>
References: <CAEKkz86pk_662dsYoZ+Rsw3mz6+d9PY91r0f=+j2A0ex-BSkJg@mail.gmail.com>
 <20190618161418.4rjaejhnsn2kbw33@mail.ziirish.info>
Message-ID: <CAEKkz868ROMR5cSq6C1KEd8yW0u-9j8Lq_f+X8YOwQGCtVZUsA@mail.gmail.com>

Thanks Ziirish.
I had a suspicion but I didn't know enough about password hashing to be
sure. I used the MySQL Password() function because I am building
the app in parts. I had done a login module but not a registration module,
which is where I would have used generate_password_hash. I just wanted to
test
the login module and that I had set up SQLAlchemy. I will work on my
registration model making sure to use generate_password_hash and see how it
goes.

Many thanks again.

On Tue, Jun 18, 2019 at 5:14 PM Ziirish <ziirish at ziirish.info> wrote:

> * On Tuesday, June 18, 2019 at 05:01 PM +0100, Abdul Mohammed <
> imonikemohammed at gmail.com> wrote:
> >
> >     def set_password(self, password):
> >        self.password_hash = generate_password_hash(password)
> >
> >     def check_password(self, password):
> >        return check_password_hash(self.password_hash, password)
> >
> >
> > The app is running off a MySQL database and I used the MySQL Password()
> > function to generate the password hashes stored in the database. Please
> > can anyone give me pointers to what I might be doing wrong?
>
> So you mean the password_hash value has actually not been initialized with
> generate_password_hash?
> That would explain why check_password_hash() doesn't work, because MySQL
> Password() function and generate_password_hash() don't return the same
> thing.
>
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From imonikemohammed at gmail.com  Tue Jun 18 12:28:34 2019
From: imonikemohammed at gmail.com (Abdul Mohammed)
Date: Tue, 18 Jun 2019 17:28:34 +0100
Subject: [Flask] Can't get Werkzeug check_password_hash method to work
In-Reply-To: <CAEKkz868ROMR5cSq6C1KEd8yW0u-9j8Lq_f+X8YOwQGCtVZUsA@mail.gmail.com>
References: <CAEKkz86pk_662dsYoZ+Rsw3mz6+d9PY91r0f=+j2A0ex-BSkJg@mail.gmail.com>
 <20190618161418.4rjaejhnsn2kbw33@mail.ziirish.info>
 <CAEKkz868ROMR5cSq6C1KEd8yW0u-9j8Lq_f+X8YOwQGCtVZUsA@mail.gmail.com>
Message-ID: <CAEKkz87k-wH3zm1Xcp6rB70M5Uped-+S-AMVoLBbRND4U56X4g@mail.gmail.com>

*and that I had set up SQLAlchemy correctly.

On Tue, Jun 18, 2019 at 5:27 PM Abdul Mohammed <imonikemohammed at gmail.com>
wrote:

> Thanks Ziirish.
> I had a suspicion but I didn't know enough about password hashing to be
> sure. I used the MySQL Password() function because I am building
> the app in parts. I had done a login module but not a registration module,
> which is where I would have used generate_password_hash. I just wanted to
> test
> the login module and that I had set up SQLAlchemy. I will work on my
> registration model making sure to use generate_password_hash and see how it
> goes.
>
> Many thanks again.
>
> On Tue, Jun 18, 2019 at 5:14 PM Ziirish <ziirish at ziirish.info> wrote:
>
>> * On Tuesday, June 18, 2019 at 05:01 PM +0100, Abdul Mohammed <
>> imonikemohammed at gmail.com> wrote:
>> >
>> >     def set_password(self, password):
>> >        self.password_hash = generate_password_hash(password)
>> >
>> >     def check_password(self, password):
>> >        return check_password_hash(self.password_hash, password)
>> >
>> >
>> > The app is running off a MySQL database and I used the MySQL Password()
>> > function to generate the password hashes stored in the database. Please
>> > can anyone give me pointers to what I might be doing wrong?
>>
>> So you mean the password_hash value has actually not been initialized with
>> generate_password_hash?
>> That would explain why check_password_hash() doesn't work, because MySQL
>> Password() function and generate_password_hash() don't return the same
>> thing.
>>
>
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From aco at miza.org  Tue Jun 18 14:28:02 2019
From: aco at miza.org (Aco Strkalj)
Date: Tue, 18 Jun 2019 13:28:02 -0500
Subject: [Flask] Can't get Werkzeug check_password_hash method to work
In-Reply-To: <CAEKkz87k-wH3zm1Xcp6rB70M5Uped-+S-AMVoLBbRND4U56X4g@mail.gmail.com>
References: <CAEKkz86pk_662dsYoZ+Rsw3mz6+d9PY91r0f=+j2A0ex-BSkJg@mail.gmail.com>
 <20190618161418.4rjaejhnsn2kbw33@mail.ziirish.info>
 <CAEKkz868ROMR5cSq6C1KEd8yW0u-9j8Lq_f+X8YOwQGCtVZUsA@mail.gmail.com>
 <CAEKkz87k-wH3zm1Xcp6rB70M5Uped-+S-AMVoLBbRND4U56X4g@mail.gmail.com>
Message-ID: <2E99D817-324E-41F8-A1CA-6FD4E9C7D56C@miza.org>

What kind of app you building?

> On Jun 18, 2019, at 11:28 AM, Abdul Mohammed <imonikemohammed at gmail.com> wrote:
> 
> *and that I had set up SQLAlchemy correctly.
> 
>> On Tue, Jun 18, 2019 at 5:27 PM Abdul Mohammed <imonikemohammed at gmail.com> wrote:
>> Thanks Ziirish.
>> I had a suspicion but I didn't know enough about password hashing to be sure. I used the MySQL Password() function because I am building 
>> the app in parts. I had done a login module but not a registration module, which is where I would have used generate_password_hash. I just wanted to test
>> the login module and that I had set up SQLAlchemy. I will work on my registration model making sure to use generate_password_hash and see how it goes.
>> 
>> Many thanks again. 
>> 
>>> On Tue, Jun 18, 2019 at 5:14 PM Ziirish <ziirish at ziirish.info> wrote:
>>> * On Tuesday, June 18, 2019 at 05:01 PM +0100, Abdul Mohammed <imonikemohammed at gmail.com> wrote:
>>> > 
>>> >     def set_password(self, password):
>>> >        self.password_hash = generate_password_hash(password)
>>> > 
>>> >     def check_password(self, password):
>>> >        return check_password_hash(self.password_hash, password)
>>> > 
>>> > 
>>> > The app is running off a MySQL database and I used the MySQL Password()
>>> > function to generate the password hashes stored in the database. Please
>>> > can anyone give me pointers to what I might be doing wrong?
>>> 
>>> So you mean the password_hash value has actually not been initialized with
>>> generate_password_hash?
>>> That would explain why check_password_hash() doesn't work, because MySQL
>>> Password() function and generate_password_hash() don't return the same thing.
> _______________________________________________
> Flask mailing list
> Flask at python.org
> https://mail.python.org/mailman/listinfo/flask
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From imonikemohammed at gmail.com  Tue Jun 18 18:20:19 2019
From: imonikemohammed at gmail.com (Abdul Mohammed)
Date: Tue, 18 Jun 2019 23:20:19 +0100
Subject: [Flask] Can't get Werkzeug check_password_hash method to work
In-Reply-To: <2E99D817-324E-41F8-A1CA-6FD4E9C7D56C@miza.org>
References: <CAEKkz86pk_662dsYoZ+Rsw3mz6+d9PY91r0f=+j2A0ex-BSkJg@mail.gmail.com>
 <20190618161418.4rjaejhnsn2kbw33@mail.ziirish.info>
 <CAEKkz868ROMR5cSq6C1KEd8yW0u-9j8Lq_f+X8YOwQGCtVZUsA@mail.gmail.com>
 <CAEKkz87k-wH3zm1Xcp6rB70M5Uped-+S-AMVoLBbRND4U56X4g@mail.gmail.com>
 <2E99D817-324E-41F8-A1CA-6FD4E9C7D56C@miza.org>
Message-ID: <CAEKkz85gXmoC2XFWk1wvhEag-a+ipQH8mZecw5GrOyBWQ6xZrw@mail.gmail.com>

It's an app for vehicle routing. The code provided is for logging into the
app.

On Tue, Jun 18, 2019, 7:28 PM Aco Strkalj <aco at miza.org> wrote:

> What kind of app you building?
>
> On Jun 18, 2019, at 11:28 AM, Abdul Mohammed <imonikemohammed at gmail.com>
> wrote:
>
> *and that I had set up SQLAlchemy correctly.
>
> On Tue, Jun 18, 2019 at 5:27 PM Abdul Mohammed <imonikemohammed at gmail.com>
> wrote:
>
>> Thanks Ziirish.
>> I had a suspicion but I didn't know enough about password hashing to be
>> sure. I used the MySQL Password() function because I am building
>> the app in parts. I had done a login module but not a registration
>> module, which is where I would have used generate_password_hash. I just
>> wanted to test
>> the login module and that I had set up SQLAlchemy. I will work on my
>> registration model making sure to use generate_password_hash and see how it
>> goes.
>>
>> Many thanks again.
>>
>> On Tue, Jun 18, 2019 at 5:14 PM Ziirish <ziirish at ziirish.info> wrote:
>>
>>> * On Tuesday, June 18, 2019 at 05:01 PM +0100, Abdul Mohammed <
>>> imonikemohammed at gmail.com> wrote:
>>> >
>>> >     def set_password(self, password):
>>> >        self.password_hash = generate_password_hash(password)
>>> >
>>> >     def check_password(self, password):
>>> >        return check_password_hash(self.password_hash, password)
>>> >
>>> >
>>> > The app is running off a MySQL database and I used the MySQL Password()
>>> > function to generate the password hashes stored in the database. Please
>>> > can anyone give me pointers to what I might be doing wrong?
>>>
>>> So you mean the password_hash value has actually not been initialized
>>> with
>>> generate_password_hash?
>>> That would explain why check_password_hash() doesn't work, because MySQL
>>> Password() function and generate_password_hash() don't return the same
>>> thing.
>>>
>> _______________________________________________
> Flask mailing list
> Flask at python.org
> https://mail.python.org/mailman/listinfo/flask
>
>
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From savageapple850 at gmail.com  Tue Jun 18 22:56:10 2019
From: savageapple850 at gmail.com (Cravan)
Date: Wed, 19 Jun 2019 10:56:10 +0800
Subject: [Flask] Unexpected result when running flask application
Message-ID: <F9CAC57C-F40F-4547-8DD8-B35C0BB9C0B1@gmail.com>

Hi all,

??????????????? I am experiencing an unexpected result when I try to run my flask application. The movie.html page prints out nothing except those in the <h1>. This appears on my webpage:

I want it to print out all the stuff related to the movie in my sql table, e.g. year, runtime etc. How should I modify my code then? Also, when trying out search.html, it prints method not allowed for the requested URL. How should I rectify this?

Cravan

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From savageapple850 at gmail.com  Wed Jun 19 00:42:31 2019
From: savageapple850 at gmail.com (Cravan)
Date: Wed, 19 Jun 2019 12:42:31 +0800
Subject: [Flask] Unexpected result when running flask application
Message-ID: <B18E7D1E-B009-4B77-933B-A33D9465D477@gmail.com>

 

 

From: cool kid <savageapple850 at gmail.com>
Date: Wednesday, 19 June 2019 at 12:08 PM
To: Frost Ming <mianghong at gmail.com>
Subject: Re: [Flask] Unexpected result when running flask application

 

Dear Frost,

                Sorry, but im a beginner at coding and am not so familiar, hence I require more elaboration. Although you mentioned that I returned early, I embedded my search.html within a link in my movies.html page, and im trying to use my info down in the search function, hence I have completely no idea where to put my search.html render template. Kindly refer to the updated code. Btw the movie page still doesn?t load after I replaced the argument.

 

From: Frost Ming <mianghong at gmail.com>
Date: Wednesday, 19 June 2019 at 11:48 AM
To: cool kid <savageapple850 at gmail.com>
Subject: Re: [Flask] Unexpected result when running flask application

 

In the search view function, you returned early so the logic below is never touched.

In the movie view function, why did you drop the `movie_title` argument?

 

The solutions lie in the above statement and don't ask for them again, please.

 

 

Cravan <savageapple850 at gmail.com> ?2019?6?19??? ??11:35???

However, I have changed with both your suggestions for movie=movie and request.args, but it still isn?t working.

 

From: Frost Ming <mianghong at gmail.com>
Date: Wednesday, 19 June 2019 at 11:34 AM
To: cool kid <savageapple850 at gmail.com>
Subject: Re: [Flask] Unexpected result when running flask application

 

The root cause is the solution itself, IMO it is clear enough.

 

Just pass `movie=movie` to `render_template`, you must have forgotten it?

 

Cravan <savageapple850 at gmail.com> ?2019?6?19??? ??11:31???

 

Thank you Frost, may I know how to rectify this?

Cravan

From: Frost Ming <mianghong at gmail.com>
Date: Wednesday, 19 June 2019 at 11:23 AM
To: cool kid <savageapple850 at gmail.com>
Subject: Re: [Flask] Unexpected result when running flask application

 

You didn't pass any movie data to the view template.

 

Cravan <savageapple850 at gmail.com> ?2019?6?19??? ??10:56???

Hi all,

                I am experiencing an unexpected result when I try to run my flask application. The movie.html page prints out nothing except those in the <h1>. This appears on my webpage:

I want it to print out all the stuff related to the movie in my sql table, e.g. year, runtime etc. How should I modify my code then? Also, when trying out search.html, it prints method not allowed for the requested URL. How should I rectify this?

Cravan

_______________________________________________
Flask mailing list
Flask at python.org
https://mail.python.org/mailman/listinfo/flask

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From srshanmugavel at gmail.com  Fri Jun 21 23:18:51 2019
From: srshanmugavel at gmail.com (shanmugavel Subramani)
Date: Sat, 22 Jun 2019 08:48:51 +0530
Subject: [Flask] Getting old value from DB
Message-ID: <CAMMcNMjueZ3xcMgRb8eJ9Wna9OKey9Jx=U0OUtpNQ_i+2twGDQ@mail.gmail.com>

I have below DB setup in my code. There are few APIs in my code and few
controllers which will serve templates and corresponding form POST
handlers. The problem is when i call /details?stu_id=abcd the handler
decorator gets invoked and I have a db query to check if the given stu_id
is present in my table(Student). I am randomly getting the passed id is not
exists in my table error. But when i checked manually its present. after
few refreshes its working fine. I dont get this problem in the APIs

Sometimes it happens in the later stages of the pages. I update status in
each page movement. When i read status from the same table using above
StuHelper methods it gives me the old value but when i checked in db
manually it has the correct value. after a refresh, it returns me some
other value which i updated in sequence and after few refreshes, it gives
me the right value from db.

Then i added *app.teardown_appcontext(close_db)* line but it's not working
still.

```app/extenstions.py
from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()

app/__init__.py
from app.extensions import db

def close_db(e=None):
    db = g.pop('db', None)

    if db is not None:
        db.close()

def initdb(db):

    print("init database...")
    try:
        from app.models import Student
        db.create_all()
    except Exception as e:
        print(e)

def creat_app(config_name):
    app.config.from_object(app_config[config_name])
    db.init_app(app)
    app.app_context().push()
    app.teardown_appcontext(close_db)
    initdb(db)

controllers/student.py

@student_blueprint('/details', methods=['GET','POST'])
@handler
def stu_details()
    print("blah")

app/utils.py

def handler(f):
@wraps(f)
    def wrapper(*args, **kwargs):
        stu_id = request.args.get("stu_id")
        if not stu_id:
            logger.debug("There is no stu_id in the query string")
            _return_fun = abort(404)
        else:
            try:
                stu_helper= db_handler.StuHelper(stu_id)
                current_status = stu_helper.get_status()
                if not current_status:
                    logger.debug("URL has not been setup")
                    abort(404)
                try:
                   _return_fun = f(*args, **kwargs)
                except:
                    _return_fun = abort(500)
        return _return_fun
    return wrapper

db_hanlder.py

class StuHelper(object):
    def __new__(cls, stu_id):
        stu_obj = Student.query_filter_by(stu_id=stu_id).first()
        if not stu_obj:
            print("stu_id not exists {0}".format(stu_id))```


I should be getting stu_id from the table when I query from ORM and correct
status value in subsequent pages query. I feel like flask maintains a stack
which gives me random behavior here. Can someone help me solving this
problem?
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From cs at cskk.id.au  Sat Jun 22 19:18:59 2019
From: cs at cskk.id.au (Cameron Simpson)
Date: Sun, 23 Jun 2019 09:18:59 +1000
Subject: [Flask] Getting old value from DB
In-Reply-To: <CAMMcNMjueZ3xcMgRb8eJ9Wna9OKey9Jx=U0OUtpNQ_i+2twGDQ@mail.gmail.com>
References: <CAMMcNMjueZ3xcMgRb8eJ9Wna9OKey9Jx=U0OUtpNQ_i+2twGDQ@mail.gmail.com>
Message-ID: <20190622231859.GA15112@cskk.homeip.net>

On 22Jun2019 08:48, shanmugavel Subramani <srshanmugavel at gmail.com> wrote:
>I have below DB setup in my code. There are few APIs in my code and few
>controllers which will serve templates and corresponding form POST
>handlers. The problem is when i call /details?stu_id=abcd the handler
>decorator gets invoked and I have a db query to check if the given stu_id
>is present in my table(Student). I am randomly getting the passed id is not
>exists in my table error. But when i checked manually its present. after
>few refreshes its working fine. I dont get this problem in the APIs
>
>Sometimes it happens in the later stages of the pages. I update status in
>each page movement. When i read status from the same table using above
>StuHelper methods it gives me the old value but when i checked in db
>manually it has the correct value. after a refresh, it returns me some
>other value which i updated in sequence and after few refreshes, it gives
>me the right value from db.
[...]
>I should be getting stu_id from the table when I query from ORM and 
>correct
>status value in subsequent pages query. I feel like flask maintains a stack
>which gives me random behavior here. Can someone help me solving this
>problem?

Is it possible that the new stu_id row is created by a transaction which 
has not been committed? I don't see any explicit transaction stuff in 
the code you quoted, but since flask is multithreaded it is possible for 
the creating transaction to be still open (uncommitted) when your query 
is made. Depending on what is going on.

Have you tried having your stu_id creation code use an explicit 
transaction:

  with session->begin():
    ... insert student data

so that the transaction is definitiely committed when you leave the 
"with" above? Otherwise you may be operating inside a longer lived 
transaction.

I'm just guessing here as its not clear from the code, but (a) 
transactions do conceal their sid effects until closed/committed and (b) 
transactions are often implicitly used if you don't manage them yourself 
and (c) they will produce effects like this as a consequence.

Cheers,
Cameron Simpson <cs at cskk.id.au>

From spaceman at antispaceman.com  Sun Jun 23 13:22:04 2019
From: spaceman at antispaceman.com (spaceman)
Date: Sun, 23 Jun 2019 18:22:04 +0100
Subject: [Flask] Getting old value from DB
In-Reply-To: <20190622231859.GA15112@cskk.homeip.net>
References: <CAMMcNMjueZ3xcMgRb8eJ9Wna9OKey9Jx=U0OUtpNQ_i+2twGDQ@mail.gmail.com>
 <20190622231859.GA15112@cskk.homeip.net>
Message-ID: <20190623172204.DBB34C9D@enterprise.home.antispaceman.com>

Cameron Simpson wrote:
> On 22Jun2019 08:48, shanmugavel Subramani <srshanmugavel at gmail.com> wrote:
> >I have below DB setup in my code. There are few APIs in my code and few
> >controllers which will serve templates and corresponding form POST
> >handlers. The problem is when i call /details?stu_id=abcd the handler
> >decorator gets invoked and I have a db query to check if the given stu_id
> >is present in my table(Student). I am randomly getting the passed id is not
> >exists in my table error. But when i checked manually its present. after
> >few refreshes its working fine. I dont get this problem in the APIs
> 
> Is it possible that the new stu_id row is created by a transaction which 
> has not been committed? I don't see any explicit transaction stuff in 
> the code you quoted, but since flask is multithreaded it is possible for 
> the creating transaction to be still open (uncommitted) when your query 
> is made. Depending on what is going on.
> 
> I'm just guessing here as its not clear from the code, but (a) 
> transactions do conceal their sid effects until closed/committed and (b) 
> transactions are often implicitly used if you don't manage them yourself 
> and (c) they will produce effects like this as a consequence.

Adding to what Cameron said that this something to do transactions
(although as far I am aware at least with Flask-SQLAlchemy autocommit
is enabled by default). I had a similar problem where changes to the
database would not show up between threads.

The problem was solved for me by fiddling with the transaction isolation
level with MySQL (it exists in other DBs as well). I had to set mine to
read-commited to get data that was committed to be readable. There are
few different levels, I suggest you do some research to find the one
that works for you. The default for MariaDB as far as I remember wasn't
sane (especially for guy coming from PHP).

I am not a database expert, I am sure there someone around here who
can fill you in as to what "Transaction Isolation" is and why it is
necessary.

Regards,
spaceman

From coreybrett at gmail.com  Tue Jun 25 08:19:00 2019
From: coreybrett at gmail.com (Corey Boyle)
Date: Tue, 25 Jun 2019 08:19:00 -0400
Subject: [Flask] flask run reloader and vscode
Message-ID: <CAD=ssw3E1SB=7HKUOcjyH3MTwVPKWyDUQX_v6Q4Nfu6koJbGRA@mail.gmail.com>

Anyone have trouble with the reloader not catching all file edits when
combined with vscode?

Sometimes I'll get an exception when I hit a page about syntax, but
just hitting the page a second time will clear the error. It's almost
like it's using multiple threads.

From savageapple850 at gmail.com  Tue Jun 25 10:04:49 2019
From: savageapple850 at gmail.com (Cravan)
Date: Tue, 25 Jun 2019 22:04:49 +0800
Subject: [Flask] Unexpected result when viewing results from a sql query
Message-ID: <32D64DFB-8E7B-451F-B999-1EB2BB4DB7E6@gmail.com>

Hi all,     

                I?m working on the same movie review project as before, but I recently tried to create a new search module for my search function, which is to search for the movie?s imdbid. Each movie has its own unique imdbid, but when I search for a single unique imdbid, somehow all the movies pop out. Can someone point out the source of the problem? On a side note, I tried to include a print statement in each condition statement, but nothing is printed, and I tried fetchone instead of fetchall, but it didn?t work either. Thanks in advance!

Here is my results function:

````

@app.route("/movie_results")

def movie_results():

    name = request.args.get("movie.title")

    year = request.args.get("movie.year")

    imdbid = request.args.get("movie.imdbid")

    name_pattern = "%" + name + "%"

    if year == '' or None and imdbid == '' or None:

        search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE title ILIKE :movie_title')

        movie_specific = engine.execute(search_movie_statement, movie_title=name_pattern).fetchall()

        if len(movie_specific) != 0 and movie_specific is not None:

            return render_template("movie_specific.html", movie_specific=movie_specific)

        if len(movie_specific) == 0:

            return render_template("error2.html", message="No such movie.")

    elif name == '' or None and imdbid == '' or None:

        search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE year = :year')

        movie_specific = engine.execute(search_movie_statement, year=year).fetchall()

        if len(movie_specific) != 0 and movie_specific is not None:

            return render_template("movie_specific.html", movie_specific=movie_specific)

        if len(movie_specific) == 0:

            return render_template("error2.html", message="No such movie.")

 

    elif name == '' or None and year == '' or None:

        search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE "imdbID" = :imdbId')

        movie_specific = engine.execute(search_movie_statement, imdbId=imdbid).fetchall()

        if len(movie_specific) != 0 and movie_specific is not None:

            return render_template("movie_specific.html", movie_specific=movie_specific)

        if len(movie_specific) == 0:

            return render_template("error2.html", message="No such movie.")

 

    elif name == '' or None:

        print(name)

        search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE "imdbID" = :imdbid AND year = :year')

        movie_specific = engine.execute(search_movie_statement, imdbid=imdbid, year=year).fetchall()

        if len(movie_specific) != 0 and movie_specific is not None:

            return render_template("movie_specific.html", movie_specific=movie_specific)

        if len(movie_specific) == 0:

            return render_template("error2.html", message="No such movie.")

 

    elif year == '' or None:

        search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE "imdbID" = :imdbid and title ILIKE :movie_title')

        movie_specific = engine.execute(search_movie_statement, imdbid=imdbid, movie_title=name_pattern).fetchall()

        if len(movie_specific) != 0 and movie_specific is not None:

            return render_template("movie_specific.html", movie_specific=movie_specific)

        if len(movie_specific) == 0:

            return render_template("error2.html", message="No such movie.")

 

    elif imdbid == '' or None:

        search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE year = :year and title ILIKE :movie_title')

        movie_specific = engine.execute(search_movie_statement, year=year, movie_title=name_pattern).fetchall()

        if len(movie_specific) != 0 and movie_specific is not None:

            return render_template("movie_specific.html", movie_specific=movie_specific)

        if len(movie_specific) == 0:

            return render_template("error2.html", message="No such movie.")

 

    elif name != None and name != '' and year != '' and year != None and imdbid != '' and imdbid != None:

        search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE year = :year and title ILIKE :movie_title and imdbID = :imdbid')

        movie_specific = engine.execute(search_movie_statement, year=year, movie_title=name_pattern, imdbid=imdbid).fetchall()

        if len(movie_specific) != 0 and movie_specific is not None:

            return render_template("movie_specific.html", movie_specific=movie_specific)

        if len(movie_specific) == 0:

            return render_template("error2.html", message="No such movie.")

````

Here is my movie table:

````

CREATE TABLE movies (

      "title" TEXT UNIQUE NOT NULL,

      "year" INTEGER NOT NULL,

      "runtime" INTEGER NOT NULL,

      "imdbID" VARCHAR NOT NULL,

      "imdbRating" NUMERIC NOT NULL

  );

````

Thanks, 

Cravan

 

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From spaceman at antispaceman.com  Tue Jun 25 14:11:21 2019
From: spaceman at antispaceman.com (spaceman)
Date: Tue, 25 Jun 2019 19:11:21 +0100
Subject: [Flask] Unexpected result when running flask application
In-Reply-To: <F9CAC57C-F40F-4547-8DD8-B35C0BB9C0B1@gmail.com>
References: <F9CAC57C-F40F-4547-8DD8-B35C0BB9C0B1@gmail.com>
Message-ID: <20190625181128.2FC6421@enterprise.home.antispaceman.com>

Cravan wrote:
> Hi all,
> 
> I am experiencing an unexpected result
> when I try to run my flask application. The movie.html page prints out
> nothing except those in the <h1>. This appears on my webpage:

> {% for movie in movie %}
> 
>     Title: {{movie_title}}
>     Year: {{movie.year}}
>     Runtime: {{movie.runtime}}
>     ImdbID: {{movie.imdbID}}
>     ImdbRating: {{movie.imdbRating}}
> 
> {% endfor %}

That should be '{% for movie in movies %}' by my reckoning.

@app.route only allows GET by default so [1]:

    @app.route("/search", methods=['GET', 'POST'])

Regards,
spaceman

1: http://flask.pocoo.org/docs/1.0/api/#url-route-registrations

From fiskomaten at gmail.com  Wed Jun 26 05:57:10 2019
From: fiskomaten at gmail.com (=?UTF-8?B?U8O4cmVuIFBpbGfDpXJk?=)
Date: Wed, 26 Jun 2019 11:57:10 +0200
Subject: [Flask] Unexpected result when viewing results from a sql query
In-Reply-To: <32D64DFB-8E7B-451F-B999-1EB2BB4DB7E6@gmail.com>
References: <32D64DFB-8E7B-451F-B999-1EB2BB4DB7E6@gmail.com>
Message-ID: <CAGXii2Z5Zg0sdk+7u75hJ2x3k-RH2FzJ3ejM8=P=0TJ04ktSug@mail.gmail.com>

On Tue, Jun 25, 2019 at 4:06 PM Cravan <savageapple850 at gmail.com> wrote:
>
> Hi all,
>
>                 I?m working on the same movie review project as before, but I recently tried to create a new search module for my search function, which is to search for the movie?s imdbid. Each movie has its own unique imdbid, but when I search for a single unique imdbid, somehow all the movies pop out. Can someone point out the source of the problem? On a side note, I tried to include a print statement in each condition statement, but nothing is printed, and I tried fetchone instead of fetchall, but it didn?t work either. Thanks in advance!
>
> Here is my results function:
>
> ````
>
> @app.route("/movie_results")
>
> def movie_results():
>
>     name = request.args.get("movie.title")
>
>     year = request.args.get("movie.year")
>
>     imdbid = request.args.get("movie.imdbid")
>
>     name_pattern = "%" + name + "%"
>
>     if year == '' or None and imdbid == '' or None:
>
>         search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE title ILIKE :movie_title')
>
>         movie_specific = engine.execute(search_movie_statement, movie_title=name_pattern).fetchall()
>
>         if len(movie_specific) != 0 and movie_specific is not None:
>
>             return render_template("movie_specific.html", movie_specific=movie_specific)
>
>         if len(movie_specific) == 0:
>
>             return render_template("error2.html", message="No such movie.")
>
>     elif name == '' or None and imdbid == '' or None:
>
>         search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE year = :year')
>
>         movie_specific = engine.execute(search_movie_statement, year=year).fetchall()
>
>         if len(movie_specific) != 0 and movie_specific is not None:
>
>             return render_template("movie_specific.html", movie_specific=movie_specific)
>
>         if len(movie_specific) == 0:
>
>             return render_template("error2.html", message="No such movie.")
>
>
>
>     elif name == '' or None and year == '' or None:
>
>         search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE "imdbID" = :imdbId')
>
>         movie_specific = engine.execute(search_movie_statement, imdbId=imdbid).fetchall()
>
>         if len(movie_specific) != 0 and movie_specific is not None:
>
>             return render_template("movie_specific.html", movie_specific=movie_specific)
>
>         if len(movie_specific) == 0:
>
>             return render_template("error2.html", message="No such movie.")
>
>
>
>     elif name == '' or None:
>
>         print(name)
>
>         search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE "imdbID" = :imdbid AND year = :year')
>
>         movie_specific = engine.execute(search_movie_statement, imdbid=imdbid, year=year).fetchall()
>
>         if len(movie_specific) != 0 and movie_specific is not None:
>
>             return render_template("movie_specific.html", movie_specific=movie_specific)
>
>         if len(movie_specific) == 0:
>
>             return render_template("error2.html", message="No such movie.")
>
>
>
>     elif year == '' or None:
>
>         search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE "imdbID" = :imdbid and title ILIKE :movie_title')
>
>         movie_specific = engine.execute(search_movie_statement, imdbid=imdbid, movie_title=name_pattern).fetchall()
>
>         if len(movie_specific) != 0 and movie_specific is not None:
>
>             return render_template("movie_specific.html", movie_specific=movie_specific)
>
>         if len(movie_specific) == 0:
>
>             return render_template("error2.html", message="No such movie.")
>
>
>
>     elif imdbid == '' or None:
>
>         search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE year = :year and title ILIKE :movie_title')
>
>         movie_specific = engine.execute(search_movie_statement, year=year, movie_title=name_pattern).fetchall()
>
>         if len(movie_specific) != 0 and movie_specific is not None:
>
>             return render_template("movie_specific.html", movie_specific=movie_specific)
>
>         if len(movie_specific) == 0:
>
>             return render_template("error2.html", message="No such movie.")
>
>
>
>     elif name != None and name != '' and year != '' and year != None and imdbid != '' and imdbid != None:
>
>         search_movie_statement = sqlalchemy.text('SELECT * FROM movies WHERE year = :year and title ILIKE :movie_title and imdbID = :imdbid')
>
>         movie_specific = engine.execute(search_movie_statement, year=year, movie_title=name_pattern, imdbid=imdbid).fetchall()
>
>         if len(movie_specific) != 0 and movie_specific is not None:
>
>             return render_template("movie_specific.html", movie_specific=movie_specific)
>
>         if len(movie_specific) == 0:
>
>             return render_template("error2.html", message="No such movie.")
>
> ````
>
> Here is my movie table:
>
> ````
>
> CREATE TABLE movies (
>
>       "title" TEXT UNIQUE NOT NULL,
>
>       "year" INTEGER NOT NULL,
>
>       "runtime" INTEGER NOT NULL,
>
>       "imdbID" VARCHAR NOT NULL,
>
>       "imdbRating" NUMERIC NOT NULL
>
>   );
>
> ````
>
> Thanks,
>
> Cravan
>
>
>
> _______________________________________________
> Flask mailing list
> Flask at python.org
> https://mail.python.org/mailman/listinfo/flask



"""
Beaware that you are using `or` wrong
x == y or z
is equivalent to (x == y) or (z)
So you have a lot of conditions depending on None to be true, which
will always fail
If you just want to test if something is falsey use `not x`
so instead of if `if x == "" or x is None` you could just write `if not x`

Also you have a lot of repetition in your code making it very hard to
reason about. I made a cleaner version.
In general this way of building search queries often explodes in
cases. You will end up with 2^n cases where n is the number of
arguments that can either be there or not. In your case there should
be 2^3=8 cases but you only handle 7.
When doing long sequences of complicated if statements it is advisable
to also have an else clause even if it theoretically should never be
hit. Make that throw an error. I marked that with ???

"""

@app.route("/movie_results")
def movie_results():
    name = request.args.get("movie.title")
    year = request.args.get("movie.year")
    imdbid = request.args.get("movie.imdbid")
    name_pattern = "%" + name + "%"
    if not year and not imdbid:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE title ILIKE :movie_title')
        movie_specific = engine.execute(search_movie_statement,
movie_title=name_pattern).fetchall()
    elif not name and not imdbid:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE year = :year')
        movie_specific = engine.execute(search_movie_statement,
year=year).fetchall()
    elif not name and not year:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE "imdbID" = :imdbId')
        movie_specific = engine.execute(search_movie_statement,
imdbId=imdbid).fetchall()
    elif not name:
        print(name)
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE "imdbID" = :imdbid AND year = :year')
        movie_specific = engine.execute(search_movie_statement,
imdbid=imdbid, year=year).fetchall()
    elif not year:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE "imdbID" = :imdbid and title ILIKE :movie_title')
        movie_specific = engine.execute(search_movie_statement,
imdbid=imdbid, movie_title=name_pattern).fetchall()
    elif not imdbid:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE year = :year and title ILIKE :movie_title')
        movie_specific = engine.execute(search_movie_statement,
year=year, movie_title=name_pattern).fetchall()
    elif name and year and imdbid:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE year = :year and title ILIKE :movie_title and imdbID = :imdbid')
        movie_specific = engine.execute(search_movie_statement,
year=year, movie_title=name_pattern, imdbid=imdbid).fetchall()
    else:
        ??? # Return some kind of error

    if len(movie_specific) != 0 and movie_specific is not None:
        return render_template("movie_specific.html",
movie_specific=movie_specific)
    if len(movie_specific) == 0:
        return render_template("error2.html", message="No such movie.")


"""
Another thing that can be done to clear the logic is to ensure that
the if statement and the used variables matches, so use the fact that
it has a value instead of it not having a value.
So you could simplify your code even further
I haven't used sqlalchemy for a while so I can't remember if you are
allowed to send unused parameters to engine.execute.
"""

@app.route("/movie_results")
def movie_results():
    title = request.args.get("movie.title")
    year = request.args.get("movie.year")
    imdbid = request.args.get("movie.imdbid")
    title_pattern = "%{title}%".format(title)
    if title and year and imdbid:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE year = :year and title ILIKE :movie_title and imdbID = :imdbid')
    elif title and year and not imdbid:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE year = :year and title ILIKE :movie_title')
    elif title and not year and imdbid:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE "imdbID" = :imdbid and title ILIKE :movie_title')
    elif not title and year and imdbid:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE "imdbID" = :imdbid AND year = :year')
    elif title and not year and not imdbid:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE title ILIKE :movie_title')
    elif not title and year and not imdbid:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE year = :year')
    elif not title and not year and imdbid:
        search_movie_statement = sqlalchemy.text('SELECT * FROM movies
WHERE "imdbID" = :imdbId')
    elif not title and not year and not imdbid:
        # Empty search, what to do here?
        ???
    else:
        assert False, "Should never happen, a case was not handled correctly"
    movie_specific = engine.execute(search_movie_statement, year=year,
movie_title=title_pattern, imdbid=imdbid).fetchall()

    if movie_specific:
        return render_template("movie_specific.html",
movie_specific=movie_specific)
    else:
        return render_template("error2.html", message="No such movie.")

"""
I find this much cleaner to reason about
"""