How to call expire_fragment from Rails Observer/Model?

Question

I\'ve pretty much tried everything, but it seems impossible to use expire_fragment from models? I know you\'re not supposed to and it\'s non-MVC, but surely there much be

Answer 1

This might not work for what you're doing, but you may be able to define a custom call back on your model:

class SomeModel < ActiveRecord::Base
    define_callback :after_exploded

    def explode
        ... do something that invalidates your cache ...
        callback :after_exploded
    end
end

You can then use a sweeper like you would normally:

class SomeModelSweeper < ActionController::Caching::Sweeper
  observe SomeModel 

    def after_exploded(model)
      ... expire your cache
    end
end

Let me know if this is useful!