fix #1611, @lefnire added a migration for deleted tags, this time it should not delete all of them ;)

migrations/20131122_deleted_tags.js

@@ -0,0 +1,13 @@
+// Cleanup broken tags
+// -------------------------
+db.users.find().forEach(function(user){
+	var tasks = user.habits.concat(user.dailys).concat(user.todos).concat(user.rewards);
+
+	_.each(tasks, function(task){
+    _.each(task.tags, function(value, key){ //value is true, key is tag.id
+      if (!_.find(user.tags,{id:key})) delete task.tags[key];
+    });
+  });
+
+  db.users.update({_id:user._id}, user);
+});

src/controllers/user.js

@@ -471,6 +471,10 @@ api.deleteTag = function(req, res){
         delete task.tags[tag.id];
       })
     })
+    user.markModified('habits');
+    user.markModified('dailys');
+    user.markModified('todos');
+    user.markModified('rewards');
     user.save(function(err,saved){
       if (err) return res.json(500, {err: err});
       res.send(204);