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filters.py
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filters.py
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from django.utils.encoding import smart_unicode
from .models import Publishable
try:
from django.contrib.admin.filters import FieldListFilter, RelatedFieldListFilter
except ImportError:
# only using this code if on before Django 1.4
from django.contrib.admin.filterspecs import FilterSpec, RelatedFilterSpec as RelatedFieldListFilter
class FieldListFilter(object):
@classmethod
def register(cls, test, list_filter_class, take_priority=False):
if take_priority:
FilterSpec.filter_specs.insert(0, (test, list_filter_class))
else:
FilterSpec.filter_specs.append((test, list_filter_class))
def is_publishable_filter(f):
return bool(f.rel) and issubclass(f.rel.to, Publishable)
class PublishableRelatedFieldListFilter(RelatedFieldListFilter):
def __init__(self, field, request, params, model, model_admin, *arg, **kw):
super(PublishableRelatedFieldListFilter, self).__init__(field, request, params, model, model_admin, *arg, **kw)
# to keep things simple we'll just remove all "non-draft" instance from list
rel_model = field.rel.to
queryset = rel_model._default_manager.complex_filter(field.rel.limit_choices_to).draft_and_deleted()
if hasattr(field.rel, 'get_related_field'):
lst = [(getattr(x, field.rel.get_related_field().attname), smart_unicode(x)) for x in queryset]
else:
lst = [(x._get_pk_val(), smart_unicode(x)) for x in queryset]
self.lookup_choices = lst
def register_filters():
FieldListFilter.register(is_publishable_filter, PublishableRelatedFieldListFilter, take_priority=True)