One more fix for django 1.4 (untested with django < 1.4)

Jan Schrewe · Jan Schrewe · commit 26402e497ee8 · 2012-03-29T23:10:46.000+02:00
diff --git a/mongodbforms/fields.py b/mongodbforms/fields.py
@@ -89,6 +89,16 @@ def clean(self, value):
         except (TypeError, InvalidId, self.queryset._document.DoesNotExist):
             raise forms.ValidationError(self.error_messages['invalid_choice'] % {'value':value})
         return obj
+    
+    # Fix for Django 1.4
+    # TODO: Test with older django version
+    # from django-mongotools by wpjunior
+    # https://github.com/wpjunior/django-mongotools/
+    def __deepcopy__(self, memo):
+        result = super(forms.ChoiceField, self).__deepcopy__(memo)
+        result.queryset = result.queryset
+        result.empty_label = result.empty_label
+        return result
 
 class DocumentMultipleChoiceField(ReferenceField):
     """A MultipleChoiceField whose choices are a model QuerySet."""
