Make Lookup object properly booled

krimkus · Jan 9, 2016 · 8bef804 · 8bef804
1 parent e1f40b0
commit 8bef804
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/django_filters/fields.py b/django_filters/fields.py
@@ -58,7 +58,12 @@ def __init__(self, *args, **kwargs):
         super(TimeRangeField, self).__init__(fields, *args, **kwargs)
 
 
-Lookup = namedtuple('Lookup', ('value', 'lookup_type'))
+class Lookup(namedtuple('Lookup', ('value', 'lookup_type'))):
+    # python nature is test __len__ on tuple types for boolean check
+    def __len__(self):
+        if not self.value:
+            return 0
+        return 2
 
 
 class LookupTypeField(forms.MultiValueField):