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Added AllValuesFilterSpec to admin changelist filters, which lets you…

… put any arbitrary field in Admin.list_filter. To determine the list of all available choices, Django does a SELECT DISTINCT. Note this is backwards-incompatible for people who have defined and registered their own FilterSpecs, because each FilterSpec now takes a 'model' parameter.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@3136 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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commit d599052a159454e33c44d9786f36189285d6c8ca 1 parent 72307a6
@adrianholovaty adrianholovaty authored
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59 django/contrib/admin/filterspecs.py
@@ -11,18 +11,18 @@
class FilterSpec(object):
filter_specs = []
- def __init__(self, f, request, params):
+ def __init__(self, f, request, params, model):
self.field = f
self.params = params
def register(cls, test, factory):
- cls.filter_specs.append( (test, factory) )
+ cls.filter_specs.append((test, factory))
register = classmethod(register)
- def create(cls, f, request, params):
+ def create(cls, f, request, params, model):
for test, factory in cls.filter_specs:
if test(f):
- return factory(f, request, params)
+ return factory(f, request, params, model)
create = classmethod(create)
def has_output(self):
@@ -48,8 +48,8 @@ def output(self, cl):
return "".join(t)
class RelatedFilterSpec(FilterSpec):
- def __init__(self, f, request, params):
- super(RelatedFilterSpec, self).__init__(f, request, params)
+ def __init__(self, f, request, params, model):
+ super(RelatedFilterSpec, self).__init__(f, request, params, model)
if isinstance(f, models.ManyToManyField):
self.lookup_title = f.rel.to._meta.verbose_name
else:
@@ -71,31 +71,31 @@ def choices(self, cl):
for val in self.lookup_choices:
pk_val = getattr(val, self.field.rel.to._meta.pk.attname)
yield {'selected': self.lookup_val == str(pk_val),
- 'query_string': cl.get_query_string( {self.lookup_kwarg: pk_val}),
+ 'query_string': cl.get_query_string({self.lookup_kwarg: pk_val}),
'display': val}
FilterSpec.register(lambda f: bool(f.rel), RelatedFilterSpec)
class ChoicesFilterSpec(FilterSpec):
- def __init__(self, f, request, params):
- super(ChoicesFilterSpec, self).__init__(f, request, params)
+ def __init__(self, f, request, params, model):
+ super(ChoicesFilterSpec, self).__init__(f, request, params, model)
self.lookup_kwarg = '%s__exact' % f.name
self.lookup_val = request.GET.get(self.lookup_kwarg, None)
def choices(self, cl):
yield {'selected': self.lookup_val is None,
- 'query_string': cl.get_query_string( {}, [self.lookup_kwarg]),
+ 'query_string': cl.get_query_string({}, [self.lookup_kwarg]),
'display': _('All')}
for k, v in self.field.choices:
yield {'selected': str(k) == self.lookup_val,
- 'query_string': cl.get_query_string( {self.lookup_kwarg: k}),
+ 'query_string': cl.get_query_string({self.lookup_kwarg: k}),
'display': v}
FilterSpec.register(lambda f: bool(f.choices), ChoicesFilterSpec)
class DateFieldFilterSpec(FilterSpec):
- def __init__(self, f, request, params):
- super(DateFieldFilterSpec, self).__init__(f, request, params)
+ def __init__(self, f, request, params, model):
+ super(DateFieldFilterSpec, self).__init__(f, request, params, model)
self.field_generic = '%s__' % self.field.name
@@ -123,14 +123,14 @@ def title(self):
def choices(self, cl):
for title, param_dict in self.links:
yield {'selected': self.date_params == param_dict,
- 'query_string': cl.get_query_string( param_dict, self.field_generic),
+ 'query_string': cl.get_query_string(param_dict, self.field_generic),
'display': title}
FilterSpec.register(lambda f: isinstance(f, models.DateField), DateFieldFilterSpec)
class BooleanFieldFilterSpec(FilterSpec):
- def __init__(self, f, request, params):
- super(BooleanFieldFilterSpec, self).__init__(f, request, params)
+ def __init__(self, f, request, params, model):
+ super(BooleanFieldFilterSpec, self).__init__(f, request, params, model)
self.lookup_kwarg = '%s__exact' % f.name
self.lookup_kwarg2 = '%s__isnull' % f.name
self.lookup_val = request.GET.get(self.lookup_kwarg, None)
@@ -142,11 +142,34 @@ def title(self):
def choices(self, cl):
for k, v in ((_('All'), None), (_('Yes'), '1'), (_('No'), '0')):
yield {'selected': self.lookup_val == v and not self.lookup_val2,
- 'query_string': cl.get_query_string( {self.lookup_kwarg: v}, [self.lookup_kwarg2]),
+ 'query_string': cl.get_query_string({self.lookup_kwarg: v}, [self.lookup_kwarg2]),
'display': k}
if isinstance(self.field, models.NullBooleanField):
yield {'selected': self.lookup_val2 == 'True',
- 'query_string': cl.get_query_string( {self.lookup_kwarg2: 'True'}, [self.lookup_kwarg]),
+ 'query_string': cl.get_query_string({self.lookup_kwarg2: 'True'}, [self.lookup_kwarg]),
'display': _('Unknown')}
FilterSpec.register(lambda f: isinstance(f, models.BooleanField) or isinstance(f, models.NullBooleanField), BooleanFieldFilterSpec)
+
+# This should be registered last, because it's a last resort. For example,
+# if a field is eligible to use the BooleanFieldFilterSpec, that'd be much
+# more appropriate, and the AllValuesFilterSpec won't get used for it.
+class AllValuesFilterSpec(FilterSpec):
+ def __init__(self, f, request, params, model):
+ super(AllValuesFilterSpec, self).__init__(f, request, params, model)
+ self.lookup_val = request.GET.get(f.name, None)
+ self.lookup_choices = model._meta.admin.manager.distinct().order_by(f.name).values(f.name)
+
+ def title(self):
+ return self.field.verbose_name
+
+ def choices(self, cl):
+ yield {'selected': self.lookup_val is None,
+ 'query_string': cl.get_query_string({}, [self.field.name]),
+ 'display': _('All')}
+ for val in self.lookup_choices:
+ val = str(val[self.field.name])
+ yield {'selected': self.lookup_val == val,
+ 'query_string': cl.get_query_string({self.field.name: val}),
+ 'display': val}
+FilterSpec.register(lambda f: True, AllValuesFilterSpec)
View
2  django/contrib/admin/views/main.py
@@ -574,7 +574,7 @@ def get_filters(self, request):
filter_fields = [self.lookup_opts.get_field(field_name) \
for field_name in self.lookup_opts.admin.list_filter]
for f in filter_fields:
- spec = FilterSpec.create(f, request, self.params)
+ spec = FilterSpec.create(f, request, self.params, self.model)
if spec and spec.has_output():
filter_specs.append(spec)
return filter_specs, bool(filter_specs)
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