add f.get_db_prep_value

Author: timgraham

django_mongodb_backend/fields/embedded_model.py

@@ -156,17 +156,19 @@ def formfield(self, **kwargs):
 
 @EmbeddedModelField.register_lookup
 class EMFExact(lookups.Exact):
-    def model_to_dict(self, instance):
+    def model_to_dict(self, instance, connection):
         """
         Return a dict containing the data in a model instance, as well as a
         dict containing the data for any embedded model fields.
         """
         data = {}
         emf_data = {}
         for f in instance._meta.concrete_fields:
-            value = f.value_from_object(instance)
+            value = f.get_db_prep_value(f.value_from_object(instance), connection)
             if isinstance(f, EmbeddedModelField):
-                emf_data[f.name] = self.model_to_dict(value) if value is not None else (None, {})
+                emf_data[f.name] = (
+                    self.model_to_dict(value, connection) if value is not None else (None, {})
+                )
                 continue
             # Unless explicitly set, primary keys aren't included in embedded
             # models.
@@ -202,7 +204,7 @@ def as_mql(self, compiler, connection):
             and isinstance(self.lhs.ref_field, EmbeddedModelField)
         ):
             if isinstance(value, models.Model):
-                value, emf_data = self.model_to_dict(value)
+                value, emf_data = self.model_to_dict(value, connection)
                 # Get conditions for any nested EmbeddedModelFields.
                 conditions = self.get_conditions({lhs_mql: (value, emf_data)})
                 return {"$and": conditions}

tests/model_fields_/test_embedded_model.py

@@ -147,16 +147,12 @@ def test_exact_with_model_ignores_key_order(self):
         # Due to the possibility of schema changes or the reordering of a
         # model's fields, a lookup must work if an embedded document has its
         # keys in a different order than what's declared on the embedded model.
-        connection.get_collection("model_fields__holder").insert_one(
-            {
-                "data": {
-                    "auto_now": None,
-                    "auto_now_add": None,
-                    "json_value": None,
-                    "integer": 100,
-                }
-            }
-        )
+        data = {}
+        for field in reversed(Data._meta.fields):
+            data[field.name] = None
+        del data["id"]
+        data["integer"] = 100
+        connection.get_collection("model_fields__holder").insert_one({"data": data})
         self.assertEqual(Holder.objects.filter(data=Data(integer=100)).get().data.integer, 100)
 
     def test_exact_with_nested_model(self):