Test filter param name existence (#281)

Author: bewing

rest_framework_filters/filterset.py

@@ -172,6 +172,10 @@ def get_param_filter_name(cls, param, rel=None):
             'email'
 
         """
+        # check for empty param
+        if not param:
+            return param
+
         # strip the rel prefix from the param name.
         prefix = '%s%s' % (rel or '', LOOKUP_SEP)
         if rel and param.startswith(prefix):

tests/test_filtering.py

@@ -385,6 +385,11 @@ class PostFilter(FilterSet):
         self.assertEqual(f.__module__, 'tests.test_filtering')
         self.assertEqual(f.__name__, 'LocalTagFilter')
 
+    def test_empty_param_name(self):
+        GET = {'': 'foo', 'author': User.objects.get(username='user2').pk}
+        f = NoteFilter(GET, queryset=Note.objects.all())
+        self.assertEqual(len(list(f.qs)), 1)
+
 
 class AnnotationTests(TestCase):
     # TODO: these tests should somehow assert that the annotation method is