I'm trying to run a test that loads a fixture. One the models has GenericForeign key to ContentType and a Foreign key to auth.Users. It associates users with content they create. I created fixture with --natural key (as per below) and can foreign keys resolved to names.
python manage.py dumpdata mtm --natural --indent=4
When running my tests I get the following error:
DeserializationError: Problem installing fixture 'fix.json': User matching query does not exist.
Sample database object as dumped by manage.py:
{
"pk": 7,
"model": "xx.vendor",
"fields": {
"phone_number": "777777777777777",
"alternative_phone_number": "",
"object_id": 1,
"contact_email": "",
"user": [
"john"
],
"content_type": [
"xx",
"axe"
],
"contact_person": "jimmy"
}
},
Full traceback:
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py", line 178, in __call__
self._pre_setup()
File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py", line 749, in _pre_setup
self._fixture_setup()
File "/usr/local/lib/python2.7/dist-packages/django/test/testcases.py", line 881, in _fixture_setup
'skip_validation': True,
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 159, in call_command
return klass.execute(*args, **defaults)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 285, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/loaddata.py", line 55, in handle
self.loaddata(fixture_labels)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/loaddata.py", line 84, in loaddata
self.load_label(fixture_label)
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/loaddata.py", line 134, in load_label
for obj in objects:
File "/usr/local/lib/python2.7/dist-packages/django/core/serializers/json.py", line 76, in Deserializer
six.reraise(DeserializationError, DeserializationError(e), sys.exc_info()[2])
File "/usr/local/lib/python2.7/dist-packages/django/core/serializers/json.py", line 70, in Deserializer
for obj in PythonDeserializer(objects, **options):
File "/usr/local/lib/python2.7/dist-packages/django/core/serializers/python.py", line 124, in Deserializer
obj = field.rel.to._default_manager.db_manager(db).get_by_natural_key(*field_value)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/models.py", line 167, in get_by_natural_key
return self.get(**{self.model.USERNAME_FIELD: username})
File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py", line 151, in get
return self.get_queryset().get(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 307, in get
self.model._meta.object_name)
EDIT:
I have confirmed that all users referenced by vendor model exist in the db.
UPDATE 1:
My prpject uses GenericForeign key to ContentType and a Foreign key to auth.Users. I dumped the data using the --natural option but this lead to the problem described above. Now I removed the --natural option and instead dumped data for all 3 apps myApp, auth, contenttypes. When I'm running the test I get "Could not load contenttypes.ContentType(pk=50): columns app_label, model are not unique". I think this is due to the contenttypes being created dynamically when models are imported. What's the way around this?
