1 files changed, 12 insertions, 4 deletions
diff --git a/mediagoblin/db/sql/base.py b/mediagoblin/db/sql/base.py
index 838080b0..ca0c8166 100644
--- a/mediagoblin/db/sql/base.py
+++ b/mediagoblin/db/sql/base.py
@@ -51,12 +51,18 @@ class GMGTableBase(object):
     query = Session.query_property()
 
     @classmethod
-    def find(cls, query_dict={}):
+    def find(cls, query_dict=None):
+        if query_dict is None:
+            query_dict = {}
+
         _fix_query_dict(query_dict)
         return cls.query.filter_by(**query_dict)
 
     @classmethod
-    def find_one(cls, query_dict={}):
+    def find_one(cls, query_dict=None):
+        if query_dict is None:
+            query_dict = {}
+
         _fix_query_dict(query_dict)
         return cls.query.filter_by(**query_dict).first()
 
@@ -79,11 +85,13 @@ class GMGTableBase(object):
         sess.add(self)
         sess.commit()
 
-    def delete(self):
+    def delete(self, commit=True):
+        """Delete the object and commit the change immediately by default"""
         sess = object_session(self)
         assert sess is not None, "Not going to delete detached %r" % self
         sess.delete(self)
-        sess.commit()
+        if commit:
+            sess.commit()
 
 
 Base = declarative_base(cls=GMGTableBase)