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?
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
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
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.
您可以使用url_for
获取控制器和操作的URL,然后使用redirect_to
转到该URL。
redirect_to url_for(:controller => :controller_name, :action => :action_name)
This is bad practice to call another controller action.
You should
My opinion:
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.
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.
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 < ApplicationController
include Createable
private def redirect_url
'one/url'
end
end
# controllers/b_controller.rb
class BController < 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.
You can call another action inside a action as follows:
redirect_to action: 'action_name'
class MyController < ApplicationController
def action1
redirect_to action: 'action2'
end
def action2
end
end
Separate these functions from controllers and put them into model file. Then include the model file in your controller.
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