#25306: Should be an easier way to restrict the choices for a ForeignKey
-------------------------------+--------------------------------------
Reporter: CuriousG102 | Owner: nobody
Type: New feature | Status: new
Component: contrib.admin | Version: 1.8
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by CuriousG102):
Anyone who googles this and finds themselves in the same rut, here's a
useful stopgap. Override the ModelAdmin's form with a form subclassed off
of this.
{{{
class LimitChoicesBaseForm(ModelForm):
limit_choices_methods = []
def __init__(self, data=None, files=None, auto_id='id_%s',
prefix=None,
initial=None, error_class=ErrorList, label_suffix=None,
empty_permitted=False, instance=None):
super(LimitChoicesBaseForm, self).__init__(data=data, files=files,
auto_id=auto_id, prefix=prefix,
initial=initial,
error_class=error_class, label_suffix=label_suffix,
empty_permitted=empty_permitted, instance=instance)
for method in self.limit_choices_methods:
formfield = self.fields[method['field_name']]
if hasattr(formfield, 'queryset'):
filter_q_object = method['method'](instance)
formfield.queryset =
formfield.queryset.filter(filter_q_object)
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/25306#comment:3>
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