django - factory_boy AttributeError: 'NoneType' Objekt hat kein Attribut '_meta'

Question

Ich schreibe Komponententests für meine Django REST Framework App und ich erstelle meine gefälschten Testdaten mit factory_boy. Ich habe über die folgenden Fehlermeldung kommen, wenn ich versuche, meine Tests

File "/Users/thomasheatwole/osf-meetings/meetings/conferences/tests.py", line 69, in setUp 
    contributor = UserFactory() 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/factory/base.py", line 67, in __call__ 
    return cls.create(**kwargs) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/factory/base.py", line 594, in create 
    return cls._generate(True, attrs) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/factory/base.py", line 519, in _generate 
    obj = cls._prepare(create, **attrs) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/factory/base.py", line 494, in _prepare 
    return cls._create(model_class, *args, **kwargs) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/factory/django.py", line 181, in _create 
    return manager.create(*args, **kwargs) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/django/db/models/manager.py", line 122, in manager_method 
    return getattr(self.get_queryset(), name)(*args, **kwargs) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/django/db/models/query.py", line 401, in create 
    obj.save(force_insert=True, using=self.db) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/django/db/models/base.py", line 708, in save 
    force_update=force_update, update_fields=update_fields) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/django/db/models/base.py", line 745, in save_base 
    update_fields=update_fields, raw=raw, using=using) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/django/dispatch/dispatcher.py", line 192, in send 
    response = receiver(signal=self, sender=sender, **named) 
File "/Users/thomasheatwole/osf-meetings/meetings/submissions/signals.py", line 19, in add_permissions_on_submission_save 
    submission, submission_contributor, conference_admin, approval) 
File "/Users/thomasheatwole/osf-meetings/meetings/submissions/permissions.py", line 167, in set_unapproved_submission_permissions 
    approval, submission_contributor) 
File "/Users/thomasheatwole/osf-meetings/meetings/approvals/permissions.py", line 62, in add_approval_permissions_to_submission_contributor 
    assign_perm("approvals.delete_approval", submission_contributor, approval) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/guardian/shortcuts.py", line 92, in assign_perm 
    return model.objects.assign_perm(perm, user, obj) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/guardian/managers.py", line 43, in assign_perm 
    obj_perm, created = self.get_or_create(**kwargs) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/django/db/models/manager.py", line 122, in manager_method 
    return getattr(self.get_queryset(), name)(*args, **kwargs) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/django/db/models/query.py", line 467, in get_or_create 
    return self._create_object_from_params(lookup, params) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/django/db/models/query.py", line 499, in _create_object_from_params 
    obj = self.create(**params) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/django/db/models/query.py", line 401, in create 
    obj.save(force_insert=True, using=self.db) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/guardian/models.py", line 39, in save 
    content_type = ContentType.objects.get_for_model(self.content_object) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/django/contrib/contenttypes/models.py", line 55, in get_for_model 
    opts = self._get_opts(model, for_concrete_model) 
File "/Users/thomasheatwole/.virtualenvs/django/lib/python2.7/site-packages/django/contrib/contenttypes/models.py", line 32, in _get_opts 
    model = model._meta.concrete_model 
AttributeError: 'NoneType' object has no attribute '_meta' 

ich ziemlich viel haben keine Ahnung, laufen, was da mein Verständnis von Back-End-Struktur vor sich geht ist nicht groß. Hier ist die Fabriken:

class UserFactory(factory.DjangoModelFactory): 
    class Meta: 
     model = User 

class ConferenceFactory(factory.DjangoModelFactory): 
    class Meta: 
     model = Conference 


class ApprovalFactory(factory.DjangoModelFactory): 
    class Meta: 
     model = approvalModels.Approval 


class SubmissionFactory(factory.DjangoModelFactory): 
    class Meta: 
     model = submissionModels.Submission 

Und hier, wo ich sie nenne:

def setUp(self): 
    self.user1 = UserFactory(
     username = 'Leo', 
     id = '99' 
     ) 
    self.user2 = UserFactory(
     username = 'LeoLeo' 
     ) 
    self.conference = ConferenceFactory(
     admin = self.user1 
    ) 
    self.submission1 = SubmissionFactory(
     conference = self.conference, 
     contributor = UserFactory() 
     ) 
    self.submission2 = SubmissionFactory(
     conference = self.conference, 
     contributor = UserFactory() 
     ) 

Wenn Sie die Fehlermeldung durchsehen, es speziell beschwert über contributor = UserFactory()

Lassen Sie mich wissen, ob es eine einfache Lösung oder sogar eine Erklärung dafür, was vor sich geht, wäre schön.

Vielen Dank!

Hier ist die Datei:

tests.py

Answer 1

Sie müssen zuerst korrekte Beziehungen (SubFactory) in der Fabrik Definition hinzuzufügen.

Bitte lesen Sie diesen Teil sorgfältig:

http://factoryboy.readthedocs.io/en/latest/recipes.html#copying-fields-to-a-subfactory