Callback and code factoring

Question

I was programming one controller which most of its methods call at the end respond_with method. So an idea comes to my mind "Can I use a callback to don't have to repeat that line more than once?"

Maybe it's some extreme and it's worthless but I need to know that. So I tested it but it don't work as expected and I really want to understand it. Whats the difference between both approaches?

Approach 1

def new
  @user = User.new
  respond_with(@user)
end

Approach 2

after_action :respond_with_call, only: [:new]  

def new
  @user = User.new
end

def respond_with_call
  respond_with(@user)
end

You say that it doesn't work. Is you ***core*** question "How do I make it work"? — New Alexandria, Jul 07 '14 at 21:10
Well, if you know other approach similar to the second, let me know ^^ — tehAnswer, Jul 08 '14 at 12:49
You could write a rack app that looked for certain situations, like a route, and then re-wrote the response with other data. That data could be `@user` marshalled into a header value. — New Alexandria, Jul 08 '14 at 22:07

score 4 · Accepted Answer · edited May 23 '17 at 12:28

4

respond_with does not work in and after_action, since the response has already been sent to the client.

Very similar to this question

edited May 23 '17 at 12:28

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answered Jul 07 '14 at 21:11

New Alexandria

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Callback and code factoring

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