Ticket #20849: lazy_model_form.diff

File lazy_model_form.diff, 627 bytes (added by david08uc@…, 11 years ago)

One line patch that avoids reduces sql multiplication for prefetched forms

  • django/forms/models.py 

    diff --git a/django/forms/models.py b/django/forms/models.py
index a5b82e5..2dd8751 100644
    a b def model_to_dict(instance, fields=None, exclude=None):  
    133133                data[f.name] = []
    134134            else:
    135135                # MultipleChoiceWidget needs a list of pks, not object instances.
    136                 data[f.name] = list(f.value_from_object(instance).values_list('pk', flat=True))
     136                data[f.name] = [v.pk for v in f.value_from_object(instance)]
    137137        else:
    138138            data[f.name] = f.value_from_object(instance)
    139139    return data
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