Refs #24227 -- Removed ManyToManyField special casing in model_to_dict().

1 files changed, 1 insertions, 15 deletions

diff --git a/django/forms/models.py b/django/forms/models.py
index 7ba98e1e26..0738421d9e 100644
--- a/django/forms/models.py
+++ b/django/forms/models.py
@@ -88,21 +88,7 @@ def model_to_dict(instance, fields=None, exclude=None):
             continue
         if exclude and f.name in exclude:
             continue
-        if f.many_to_many:
-            # If the object doesn't have a primary key yet, just use an empty
-            # list for its m2m fields. Calling f.value_from_object will raise
-            # an exception.
-            if instance.pk is None:
-                data[f.name] = []
-            else:
-                # MultipleChoiceWidget needs a list of pks, not object instances.
-                qs = f.value_from_object(instance)
-                if qs._result_cache is not None:
-                    data[f.name] = [item.pk for item in qs]
-                else:
-                    data[f.name] = list(qs.values_list('pk', flat=True))
-        else:
-            data[f.name] = f.value_from_object(instance)
+        data[f.name] = f.value_from_object(instance)
     return data