I have a User model that has a :credits attribute. I want a simple button that will add 5 to the user\'s credits, through a route called \"add\" so that /users/3/add would ad
To update multiple attributes without callbacks you can use update_all in your model as so:
self.class.update_all({name: value, name: value}, self.class.primary_key => id)
If you really want you can even try even a update_columns method and mixin this to your active record base class.
To update one attribute you can use update_column. In addition there is some specific methods that can found in the rails guides http://guides.rubyonrails.org/active_record_callbacks.html#skipping-callbacks