order_with_respect_to fails on a relationship on a model that has not yet been defined

[Goldan]

If I specify 'order_with_respect_to' on a field linked to a model that hasn't been defined yet, I get the following error:

<...>File "/usr/lib/python2.6/dist-packages/django/db/models/base.py", line 223, in _prepare
    setattr(opts.order_with_respect_to.rel.to, 'get_%s_order' % cls.__name__.lower(), curry(method_get_order, cls))
AttributeError: 'str' object has no attribute 'get_location_order'

When I swap declarations of Location and City models, the error disappears.

Here is the code:

class Location(TimeStampedModel):
    '''Single location on a map, e.g. building.'''
    address = models.CharField(u"адрес", max_length=75, help_text=u"Улица, корпус, дом")
    city = models.ForeignKey('City', related_name="locations", verbose_name=u"город")
    metro_stations = models.ManyToManyField('MetroStation', related_name="locations", verbose_name=u"ближайшие станции метро", blank=True, null=True)

    class Meta:
        verbose_name = u"адрес"
        verbose_name_plural = u"адреса"
        order_with_respect_to = 'city'

class City(TimeStampedModel):
    '''A city.'''
    name = models.CharField(u"название", max_length=30)

    class Meta:
        verbose_name = u"город"
        verbose_name_plural = u"города"

[Ramiro Morales]

(reformatted description, please use the 'Preview' button)

[Gabriel Grant]

Patch (with test) fixing the problem

[Gabriel Grant]

I've attached a patch with a test which fixes the bug, but since this is the first patch I've submitted to django, I'm not sure what the next step is to move it forward...

If anyone has any comments on the patch, I'd love to hear them.

Thanks!
-Gabriel

[Gabriel Grant]

doctest moved to unittest at the request of Alex Gaynor

[Gabriel Grant]

unittestified *with 4-space indent*

[Alex Gaynor]

A few line length fixes.

[Alex Gaynor]

Missing tests :/

[Alex Gaynor]

(In [14045]) Fixed #13241. order_with_respect_to now works with ForeignKeys who refer to their model lazily (i.e. with a string). Thanks to Gabriel Grant for the patch.

[Alex Gaynor]

(In [14046]) [1.2.X] Fixed #13241. order_with_respect_to now works with ForeignKeys who refer to their model lazily (i.e. with a string). Thanks to Gabriel Grant for the patch. This is a backport of [14045].