Do not bypass many-to-many related fields. (#299)

* Do not bypass many-to-many related fields.

* Update changelog

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Changed
 - Extend type hints in `model_bakery.recipe` module, make `Recipe` class generic [PR #292](https://github.com/model-bakers/model_bakery/pull/292)
 - Explicitly add _fill_optional parameters to baker.make and baker.prepare to aid IDE autocomplete function. [PR #264](https://github.com/model-bakers/model_bakery/pull/264)
+- Fixed errors with reverse M2M relationships [PR #299](https://github.com/model-bakers/model_bakery/pull/299)
 
 ### Removed
 

model_bakery/baker.py

@@ -30,7 +30,11 @@
 from django.db.models.fields.related import (
     ReverseManyToOneDescriptor as ForeignRelatedObjectsDescriptor,
 )
-from django.db.models.fields.reverse_related import ManyToOneRel, OneToOneRel
+from django.db.models.fields.reverse_related import (
+    ManyToManyRel,
+    ManyToOneRel,
+    OneToOneRel,
+)
 
 from . import generators, random_gen
 from ._types import M, NewM
@@ -404,8 +408,8 @@ def get_fields(self) -> Any:
 
     def get_related(
         self,
-    ) -> List[Union[ManyToOneRel, OneToOneRel]]:
-        return [r for r in self.model._meta.related_objects if not r.many_to_many]
+    ) -> List[Union[ManyToOneRel, OneToOneRel, ManyToManyRel]]:
+        return [r for r in self.model._meta.related_objects]
 
     def _make(
         self,

tests/generic/models.py

@@ -231,6 +231,16 @@ class Classroom(models.Model):
     active = models.BooleanField(null=True)
 
 
+class ClassroomM2MRelated(models.Model):
+    """
+    This model was created in order to reproduce the scenario described
+    at issue 248 that is: a model with a M2M field (Classroom) being also used
+    as a M2M field from another model (ClassroomM2MRelated)
+    """
+
+    related_classrooms = models.ManyToManyField(Classroom)
+
+
 class Store(models.Model):
     customers = models.ManyToManyField(Person, related_name="favorite_stores")
     employees = models.ManyToManyField(Person, related_name="employers")