Ticket #25226: arrayfield-set-model-on-base-field.diff

django/contrib/postgres/fields/array.py

@@ -28 +28 @@
             self.default_validators.append(ArrayMaxLengthValidator(self.size))
         super(ArrayField, self).__init__(**kwargs)
 
+    def contribute_to_class(self, cls, name, **kwargs):
+        super(ArrayField, self).contribute_to_class(cls, name, **kwargs)
+        self.base_field.model = cls
+
     def check(self, **kwargs):
         errors = super(ArrayField, self).check(**kwargs)
         if self.base_field.remote_field:

tests/postgres_tests/test_array.py

@@ -97 +97 @@
         self.assertEqual(instance.uuids, loaded.uuids)
         self.assertEqual(instance.decimals, loaded.decimals)
 
+    def test_model_is_set_on_base_field_too(self):
+        instance = IntegerArrayModel()
+
+        field = instance._meta.get_field('field')
+        self.assertEqual(field.model, IntegerArrayModel)
+        self.assertEqual(field.base_field.model, IntegerArrayModel)
+
 
 class TestQuerying(PostgreSQLTestCase):