Ticket #3520: manager.diff

django/db/models/manager.py

@@ -84 +84 @@
     def complex_filter(self, *args, **kwargs):
         return self.get_query_set().complex_filter(*args, **kwargs)
 
+    def search_filter(self, lookups, data, **kwargs):
+        """Runs filter using field lookups and values from supplied dicts.
+        For example, running search_filter with --
+            lookups = {'myfield': 'myfield', 'mytext': 'mytext__startswith', 'mydate': 'mydata__lte'}
+            data = {'myfield': 'somevalue', 'mytext': 'h', 'mydate': ''}
+        Would be the same as --
+            filter(myfield='somevalue', mytext__startswith='h')
+        Skips empty values. Useful for searching against form or request data.
+        """
+        sf_args = {}
+        for item in lookups:
+            if data.has_key(item):
+                if data[item] != '' and data[item] != None:
+                    sf_args[lookups[item]] = data[item]
+        sf_args.update(kwargs)
+        return self.get_query_set().filter(**sf_args)
+
     def exclude(self, *args, **kwargs):
         return self.get_query_set().exclude(*args, **kwargs)