[Soap-Python] Creating a "Tree" response with spyne

[Ken Prows]

On Tue, Jan 8, 2013 at 11:13 AM, Burak Arslan
<burak.arslan at arskom.com.tr> wrote:
> On 01/08/13 18:01, Ken Prows wrote:
>>
>> So it looks like SelfReference doesn't work within an Array.
>
> Hi there,
>
> That's correct. What you can do instead:
>
> class Category(ComplexModel):
>     category_id = Integer(min_occurs=1, max_occurs=1, nillable=False)
>     name = Unicode(min_occurs=1, max_occurs=1, nillable=False)
>
> Category._type_info['children'] = Array(Category)
>
> Does it help?
>

Thank you for the super quick response! :)

Unfortunately, Category._type_info['children'] = Array(Category) dies with:

...
  File "/Library/Python/2.7/site-packages/spyne-2.10.0-py2.7.egg/spyne/model/complex.py",
line 591, in resolve_namespace
    v.resolve_namespace(v, default_ns)
  File "/Library/Python/2.7/site-packages/spyne-2.10.0-py2.7.egg/spyne/model/_base.py",
line 212, in resolve_namespace
    not cls.is_default(cls)):
  File "/Library/Python/2.7/site-packages/spyne-2.10.0-py2.7.egg/spyne/model/primitive.py",
line 208, in is_default
    and cls.Attributes.max_len == Unicode.Attributes.max_len
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py",
line 868, in __eq__
    if self._check_nans(other, context):
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py",
line 738, in _check_nans
    self_is_nan = self._isnan()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/decimal.py",
line 709, in _isnan
    if exp == 'n':
RuntimeError: maximum recursion depth exceeded in cmp

>> would it be possible to add support
>> for Array(SelfReference) in a future version of spyne?
>
>
> If you write the test for it, I can implement it.
>
> Best,
> Burak
>

I'm not sure exactly how I would write a test for
Array(SelfReference). Below is my shot at it though.

In test_complex.py, within the TestComplexModel class:

    def test_tree_class(self):

        class Category(ComplexModel):
            category_id = Integer
            name = String
            children = Array(SelfReference)

        parent = Category()
        parent.id = 1
        parent.name = "Electronics"
        parent.children = []

        child1 = Category()
        child1.id = 2
        child1.name = "TVs"
        parent.children.append(child1)

        child2 = Category()
        child2.id = 3
        child2.name = "Cameras"
        parent.children.append(child2)

        assert (len(parent.children) == 2)
        assert (isinstance(parent, Category))
        assert (isinstance(parent.children[0], Category))
        assert (isinstance(parent.children[1], Category))

The asserts probably aren't really needed. If the code doesn't die, I
don't think those asserts could ever fail.

Thanks again for the help,
Ken