How to pass objects from one controller to another controller

Question

On an unsuccessful save, I would like to redirect to the previous view but with the error message.

redirect_to user_path(@user_id), errors: @user.errors

but in the view, when I check for errors I get an undefined variable errors.

I am not using the same controller new and create, so I can't have @user.errors.any in new.html.erb. I have two different controllers, one in which form is there, and another controller which will take care of create, if the create is not happening I need to redirect to the previous controller.

You have to set flash[:error] to your expected error message, then you should be able to access it in the views using the same flash[:error]. — Mohanraj
– Mohanraj, Commented Sep 18, 2017 at 13:02

Thanh · Accepted Answer · 2017-09-18 13:09:58Z

1

You may need to use render instead of redirect_to. Something like this:

# controller_1
def step_1
  @user = User.new
  @user.do_something
  ...
end

# controller_2
def step_2
 if @user.save?
   # redirect to another...
 else
   render 'controller_1/step_1`
 end
end

Then on view step_1.html.erb, you can print out errors of @user with @user.errors.

answered Sep 18, 2017 at 13:09

Thanh

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Mohanraj · Accepted Answer · 2017-09-18 14:00:44Z

0

You have to pass the parameters inside the redirect_to helper like below,

redirect_to user_path(id: @user_id, error: @user.errors.messages)

Please check the rake routes and pass the appropriate key for id, whether it's :id, or :user_id

edited Sep 18, 2017 at 14:00

answered Sep 18, 2017 at 13:46

Mohanraj

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2 Comments

gates Over a year ago

params[:error] => "#<ActiveModel::Errors:0x007f4ab4014b80>" Okay, Now I am able to get the error in params, but it's coming like this. How do I parse this object?

gates Over a year ago

Yeh I think, i will prefer user.errors.messages .. thanks

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