Fix issue and add test coverage (#385)

model_bakery/baker.py

@@ -841,4 +841,18 @@ def bulk_create(baker: Baker[M], quantity: int, **kwargs) -> List[M]:
                         for obj in kwargs[field.name]
                     ]
                 )
+
+        # set many-to-many relations that are specified using related name from kwargs
+        for field in baker.model._meta.get_fields():
+            if field.many_to_many and hasattr(field, "related_model"):
+                reverse_relation_name = (
+                    field.related_query_name
+                    or field.related_name
+                    or f"{field.related_model._meta.model_name}_set"
+                )
+                if reverse_relation_name in kwargs:
+                    getattr(entry, reverse_relation_name).set(
+                        kwargs[reverse_relation_name]
+                    )
+
     return created_entries

tests/generic/models.py

@@ -478,3 +478,11 @@ class ModelWithAutoNowFields(models.Model):
     sent_date = models.DateTimeField()
     created = models.DateTimeField(auto_now_add=True)
     updated = models.DateTimeField(auto_now=True)
+
+
+class House(models.Model):
+    pass
+
+
+class HouseDetail(models.Model):
+    houses = models.ManyToManyField(House, blank=True)

tests/test_baker.py

@@ -1039,8 +1039,8 @@ def test_annotation_within_manager_get_queryset_are_run_on_make(self):
         assert movie.title == movie.name
 
 
+@pytest.mark.django_db
 class TestCreateM2MWhenBulkCreate(TestCase):
-    @pytest.mark.django_db
     def test_create(self):
         query_count = 13 if DJANGO_VERSION >= (4, 0) else 14
         with self.assertNumQueries(query_count):
@@ -1051,6 +1051,13 @@ def test_create(self):
         c1, c2 = models.Classroom.objects.all()[:2]
         assert list(c1.students.all()) == list(c2.students.all()) == [person]
 
+    def test_make_should_create_objects_using_reverse_name(self):
+        detail = baker.make(models.HouseDetail)
+        houses = baker.make(
+            models.House, housedetail_set=[detail], _quantity=20, _bulk_create=True
+        )
+        assert houses[0].housedetail_set.count() == 1
+
 
 class TestBakerSeeded:
     @pytest.fixture()