Django-nonrel form field for ListField

Question

I\'m experimenting with django-nonrel on appengine and trying to use a djangotoolbox.fields.ListField to implement a many-to-many relation. As I re

Answer 1

You could avoid a custom form class for such usage by inquiring for the model object

class ModelListField(ListField):
  def __init__(self, embedded_model=None, *args, **kwargs):
  super(ModelListField, self).__init__(*args, **kwargs)
  self._model = embedded_model.embedded_model

  def formfield(self, **kwargs):
    return FormListField(model=self._model, **kwargs)

class ListFieldWidget(SelectMultiple):
  pass

class FormListField(MultipleChoiceField):
  widget = ListFieldWidget

  def __init__(self, model=None, *args, **kwargs):
    self._model = model
    super(FormListField, self).__init__(*args, **kwargs)
    self.widget.choices = [(unicode(i.pk), i) for i in self._model.objects.all()]

  def to_python(self, value):
    return [self._model.objects.get(pk=key) for key in value]

  def clean(self, value):
    return value