Ticket #7938: 7938_custom_primary_key_formset_fix.1.diff

django/forms/models.py

@@ -378 +378 @@
 
     def add_fields(self, form, index):
         """Add a hidden field for the object's primary key."""
-        self._pk_field_name = self.model._meta.pk.attname
-        form.fields[self._pk_field_name] = IntegerField(required=False, widget=HiddenInput)
+        if self.model._meta.has_auto_field:
+            self._pk_field_name = self.model._meta.pk.attname
+            form.fields[self._pk_field_name] = IntegerField(required=False, widget=HiddenInput)
         super(BaseModelFormSet, self).add_fields(form, index)
 
 def modelformset_factory(model, form=ModelForm, formfield_callback=lambda f: f.formfield(),