Chapter 2. Working with Controllers
Remove all Business Logic from your Controllers and put it in the model. Your Controllers are only responsible for mapping between URLs (including other HTTP Request data), coordinating with your Models and your Views, and channeling that back to an HTTP response. Along the way, Controllers may do Access Control, but little more. These instructions are precise, but following them requires intuition and subtle reasoning.
Like any computer program, your Rails application involves the flow of control from one part of your code to another. The flow of program control gets pretty complex with Rails applications. ...
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