Merge pull request #1654 from HabitRPG/paglias/remove-deleted-tags

Migration to remove deleted tags from tasks

migrations/20131028_cleanup_deleted_tags.js

@@ -0,0 +1,17 @@
+_.each(db.users.find(), function(user){
+  var tags = user.tags;
+
+  _.each(user.tasks, function(task){
+    _.each(task.tags, function(val, key){
+      _.each(tags, function(tag){
+        if(key == tag.id) delete task.tags[key];
+      });
+    };
+  });
+
+  try {
+    db.users.update({_id:user._id}, user);
+  } catch(e) {
+    print(e);
+  }
+});