str(models.Field()) crashes

[Sergey Fedoseev]

In [1]: from django.db.models import Field

In [2]: str(Field())
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-2-4740ae05790d> in <module>()
----> 1 str(Field())

/home/sergey/dev/django/django/utils/six.pyc in <lambda>(self)
    840                              klass.__name__)
    841         klass.__unicode__ = klass.__str__
--> 842         klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
    843     return klass
    844

/home/sergey/dev/django/django/db/models/fields/__init__.pyc in __str__(self)
    188     def __str__(self):
    189         """ Return "app_label.model_label.field_name". """
--> 190         model = self.model
    191         app = model._meta.app_label
    192         return '%s.%s.%s' % (app, model._meta.object_name, self.name)

AttributeError: 'Field' object has no attribute 'model'

[Tim Graham]

We could return super() for fields not attached to models -- do you have any other idea in mind?

[Morgan Aubert]

We could return super() for fields not attached to models

It seems like the right thing to do.

[Morgan Aubert]

Added ​PR

[Tim Graham <timograham@…>]

In ef889d5b:

Fixed #27599 -- Fixed Field.str() crash for fields not attached to models.