Model crashes with ForeignKey('self') and a field with the same name

[Stefano J. Attardi <django@…>]

The following model will fail on install:

class Test(models.Model):
    this = models.ForeignKey("self")
    test = models.TextField()
    class Admin: pass

with this message:

At least one field in Test should have core=True, because it's being edited inline by test.Test.

If you add core=True as the message suggests:

class Test(models.Model):
    this = models.ForeignKey("self")
    test = models.TextField(core=True)
    class Admin: pass

then the admin crashes on the add page with the following error:

Exception Type:	AttributeError
Exception Value:	'bool' object has no attribute 'get'
Exception Location:	django\db\models\related.py in get_manipulator_fields, line 112

[Stefano J. Attardi]

See #1839.

[James Bennett]

(In [4673]) 0.91-bugfixes: Fixed #999 by resolving name clash in the metasystem which could confuse manipulators about which fields they should follow. Refs #1808, #1826, #1839 and #2415, which are variations of this that persist in trunk.