How to model government organization hierarchies so that the list can expand and compress

[Stéphane Wirtel]

Create a model with a parent_id on the current model

and you can use the mptt concept or some others for the reading.


On 13 Aug 2015, at 21:10, Alex Glaros wrote:

> It's like the desktop folder/directory model where you can create 
> unlimited folders and put folders within other folders. Instead of 
> folders, I want to use government organizations.
>
> Example: Let user create agency names: Air Force, Marines, Navy, Army. 
> Then let them create an umbrella collection called "Pentagon", and let 
> users drag Air Force, Marines, Navy, etc. into the umbrella 
> collection.
>
> User may wish to add smaller sub-sets of Army, such as "Army Jeep 
> Repair Services"
>
> User may also want to add a new collection "Office of the President" 
> and put OMB and Pentagon under that as equals.
>
> What would the data model look like for this?  If I have a field: 
> next_higher_level_parent that lets children records keep track of 
> parent record, it's hard for me to imagine anything but an inefficient 
> bubble sort to produce a hierarchical organizational list. Am using 
> Postgres, not graph database.
>
> I'm hoping someone else has worked on this problem, probably not with 
> government agency names, but perhaps the same principle with other 
> objects.
>
> Thanks!
>
> Alex Glaros
> -- 
> https://mail.python.org/mailman/listinfo/python-list


--
Stéphane Wirtel - http://wirtel.be - @matrixise