Testing nested serializers with models that have str foreign key references.

rest_framework/runtests/settings.py

@@ -100,6 +100,9 @@ INSTALLED_APPS = (
     'rest_framework',
     'rest_framework.authtoken',
     'rest_framework.tests',
+    'rest_framework.tests.accounts',
+    'rest_framework.tests.records',
+    'rest_framework.tests.users',
 )
 
 # OAuth is optional and won't work if there is no oauth_provider & oauth2

rest_framework/tests/accounts/models.py

+from django.db import models
+
+from rest_framework.tests.users.models import User
+
+
+class Account(models.Model):
+    owner = models.ForeignKey(User, related_name='accounts_owned')
+    admins = models.ManyToManyField(User, blank=True, null=True, related_name='accounts_administered')

rest_framework/tests/accounts/serializers.py

+from rest_framework import serializers
+
+from rest_framework.tests.accounts.models import Account
+from rest_framework.tests.users.serializers import UserSerializer
+
+
+class AccountSerializer(serializers.ModelSerializer):
+    admins = UserSerializer(many=True)
+
+    class Meta:
+        model = Account

rest_framework/tests/records/models.py

+from django.db import models
+
+
+class Record(models.Model):
+    account = models.ForeignKey('accounts.Account', blank=True, null=True)
+    owner = models.ForeignKey('users.User', blank=True, null=True)

rest_framework/tests/test_serializer_nested.py

@@ -346,3 +346,8 @@ class NestedModelSerializerUpdateTests(TestCase):
         result.save()
         self.assertEqual(result.id, john.id)
 
+
+class ImportingModelSerializerWithStrForeignKeys(TestCase):
+    def test_import_model_serializer(self):
+        from rest_framework.tests.accounts.serializers import AccountSerializer
+        self.assertIsInstance(AccountSerializer(), serializers.ModelSerializer)

rest_framework/tests/users/models.py

+from django.db import models
+
+
+class User(models.Model):
+    account = models.ForeignKey('accounts.Account', blank=True, null=True, related_name='users')
+    active_record = models.ForeignKey('records.Record', blank=True, null=True)

rest_framework/tests/users/serializers.py

+from rest_framework import serializers
+
+from rest_framework.tests.users.models import User
+
+
+class UserSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = User