Re: field-null or not-null filter?
*You can define your own NullListFilter. I did it this way:*
class NullListFilter(FieldListFilter):
def __init__(self, field, request, params, model, model_admin,
field_path):
self.lookup_kwarg = '%s__isnull' % field_path
self.lookup_val = request.GET.get(self.lookup_kwarg, None)
super(NullListFilter, self).__init__(field, request, params, model,
model_admin, field_path)
def expected_parameters(self):
return [self.lookup_kwarg]
def choices(self, cl):
for lookup, title in (
(None, _('All')),
('False', _('Yes')),
('True', _('No'))):
yield {
'selected': self.lookup_val == lookup,
'query_string': cl.get_query_string({
self.lookup_kwarg: lookup, }),
'display': title,
}
FieldListFilter.register(lambda f: True, NullListFilter)
*Then you can use it in admin like this:*
list_filter = [('field_which_is_foreign_key', NullListFilter)]
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field-null or not-null filter?
Hey guys,
I was wondering if there is a way of making a field null vs not-null filter
without coding it yourself?
I tried:
list_filter = (('field_which_is_foreign_key', BooleanFieldListFilter),)
In the end I wrote this little one:
class MyFieldFilter(SimpleListFilter):
title = _(' field_which_is_foreign_key ')
parameter_name = ' field_which_is_foreign_key _n'
def lookups(self, request, model_admin):
return (
('T', _('Null')),
('F', _('Not Null')),
)
def queryset(self, request, queryset):
if self.value() == 'T':
return queryset.filter( field_which_is_foreign_key=None)
if self.value() == 'F':
return queryset.exclude( field_which_is_foreign_key =None)
But that's not very generic, I might need this for more fields!
Any way to do it with a bool filter?
- bram
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