rails redirect_to :back not working

Question

I'm trying to use the following:

class PaymentsController < ApplicationController    def addproduct      (session[:products] ||= []) << params[:item]      redirect_to :back   end   end 

I got this exception:

undefined method `back_url' for #<PaymentsController:0x007ff682c467a8> 

Why this is happening?

Answer 1

Rails 5 has redirect_back, instead of redirect_to :back. It was changed as it used to raise an exception when request's HTTP_REFERER was not present.

So use this:

redirect_back fallback_location: root_path 

You can change root_path to something else as per your requirements.

Answer 2

redirect_to :back was deprecated in Rails 5.0 (see PR) and then removed in Rails 5.1

Use the following instead:

redirect_back(fallback_location: root_path)