[Rails] Bye-bye, Observers

Hiya

No more observers in Rails 4, farewell, never been much of a fan anyway.

However, one of my gems is enabling model attributes for use with a client-side WYSIWYM editor. The sanitized markup ends up in the database and has to be processed before shown in a view. The corresponding helper does fragment caching. This cache has to be zapped when the model is modified or deleted. And since the gem is generic, an observer for "after_update" "after_destroy" seemed the obvious choice for this.

What would be the Rails 4 state of the art approach do do this without using observers? Inject the above callbacks into the model directly?

-sven

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