Rails call another controller action from a controller

Question

I need to call the create action in controller A  from controller B    The reason is that I need to redirect differently when I m calling from controller B   Can it be done in Rails

User · Answer

You can use url for to get the URL for a controller and action and then use redirect to to go to that URL   redirect to url for  controller   gt   controller name   action   gt   action name

User · Answer

To use one controller from another  do this   def action that calls one from another controller   controller you want   ControllerYouWant new   controller you want request   request   controller you want response   response   controller you want action you want end

User · Answer

You can use a redirect to that action    redirect to your controller action url   More on   Rails Guide  To just render the new action    redirect to your controller action url and return

User · Answer

Composition to the rescue   Given the reason  rather than invoking actions across controllers one should design controllers to seperate shared and custom parts of the code  This will help to avoid both - code duplication and breaking MVC pattern   Although that can be done in a number of ways  using concerns  composition  is a good practice     controllers a controller rb class AController  lt  ApplicationController   include Createable    private def redirect url      one url    end end    controllers b controller rb class BController  lt  ApplicationController   include Createable    private def redirect url      another url    end end    controllers concerns createable rb module Createable   def create     do usefull things     redirect to redirect url   end end   Hope that helps

User · Answer

Perhaps the logic could be extracted into a helper   helpers are available to all classes and don t transfer control  You could check within it  perhaps for controller name  to see how it was called

User · Answer

This is bad practice to call another controller action   You should    duplicate this action in your controller B  or  wrap it as a model method  that will be shared to all controllers  or  you can extend this action in controller A    My opinion    First approach is not DRY but it is still better than calling for another action  Second approach is good and flexible  Third approach is what I used to do often  So I ll show little example   def create    my obj   MyModel new params  my model     if  my obj save     redirect to params  redirect to     some default path    end end    So you can send to this action redirect to param  which can be any path you want

User · Answer

You can call another action inside a action as follows   redirect to action   action name   class MyController  lt  ApplicationController   def action1    redirect to action   action2    end    def action2   end end

User · Answer

The logic you present is not MVC  then not Rails  compatible    A controller renders a view or redirect A method executes code   From these considerations  I advise you to create methods in your controller and call them from your action   Example    def index    get variable  end   private   def get variable     var   Var all  end   That said you can do exactly the same through different controllers and summon a method from controller A while you are in controller B   Vocabulary is extremely important that s why I insist much

User · Answer

Separate these functions from controllers and put them into model file  Then include the model file in your controller

[ruby-on-rails] Rails: call another controller action from a controller

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