Fixed an issue where queryset needed to be defined for build_filters …

…to succeed on a ModelResource. Affected alternate implementations of ModelResource.

Thanks Mitar for the patch, test, and follow-up
Closes #670

AUTHORS

@@ -65,7 +65,7 @@ Contributors:
 * Vladimir Volodin (vvolodin) for patching ToManyField callable attributes.
 * Mike Urbanski (mcu) for patching ``Paginator.get_limit``.
 * Jason Brownbridge (jbrownbridge) for patching multiple ``offset/limit`` params appearing in pagination URIs.
-
+* Mitar for compatability patches with django-tastypie-mongoengine
 
 Thanks to Tav for providing validate_jsonp.py, placed in public domain.
 

tastypie/resources.py

@@ -1758,7 +1758,7 @@ def build_filters(self, filters=None):
 
         qs_filters = {}
 
-        if hasattr(self._meta, 'queryset'):
+        if getattr(self._meta, 'queryset', None) is not None:
             # Get the possible query terms from the current QuerySet.
             if hasattr(self._meta.queryset.query.query_terms, 'keys'):
                 # Django 1.4 & below compatibility.
@@ -1767,7 +1767,12 @@ def build_filters(self, filters=None):
                 # Django 1.5+.
                 query_terms = self._meta.queryset.query.query_terms
         else:
-            query_terms = QUERY_TERMS.keys()
+            if hasattr(QUERY_TERMS, 'keys'):
+                # Django 1.4 & below compatibility.
+                query_terms = QUERY_TERMS.keys()
+            else:
+                # Django 1.5+.
+                query_terms = QUERY_TERMS
 
         for filter_expr, value in filters.items():
             filter_bits = filter_expr.split(LOOKUP_SEP)

tests/core/tests/resources.py

@@ -703,6 +703,16 @@ def get_resource_uri(self, bundle_or_obj=None, url_name='api_dispatch_list'):
         return '/api/v1/notes/%s/' % bundle_or_obj.obj.id
 
 
+class NoQuerysetNoteResource(ModelResource):
+    class Meta:
+        resource_name = 'noqsnotes'
+        authorization = Authorization()
+        filtering = {
+            'name': ALL,
+        }
+        object_class = Note
+
+
 class LightlyCustomNoteResource(NoteResource):
     class Meta:
         resource_name = 'noteish'
@@ -1521,6 +1531,10 @@ def test_build_filters(self):
         # Make sure that fields that don't have attributes can't be filtered on.
         self.assertRaises(InvalidFilterError, resource_4.build_filters, filters={'notes__hello_world': 'News'})
 
+        # Make sure build_filters works even on resources without queryset
+        resource = NoQuerysetNoteResource()
+        self.assertEqual(resource.build_filters(), {})
+
     def test_apply_sorting(self):
         resource = NoteResource()