Updated TagManager.usage_for_queryset to work with Django 1.7.x

Author: Fantomas42

tagging/models.py

@@ -159,12 +159,15 @@ def usage_for_queryset(self, queryset, counts=False, min_count=None):
         """
 
         if getattr(queryset.query, 'get_compiler', None):
-            # Django 1.2+
             compiler = queryset.query.get_compiler(using='default')
+            if getattr(compiler, 'compile', None):
+                # Django 1.7+
+                where, params = compiler.compile(queryset.query.where)
+            else:
+                # Django 1.2+
+                where, params = queryset.query.where.as_sql(
+                    compiler.quote_name_unless_alias, compiler.connection)
             extra_joins = ' '.join(compiler.get_from_clause()[0][1:])
-            where, params = queryset.query.where.as_sql(
-                compiler.quote_name_unless_alias, compiler.connection
-            )
         else:
             # Django pre-1.2
             extra_joins = ' '.join(queryset.query.get_from_clause()[0][1:])