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Display error pages for exceptions

We want to display to your users meaningful errors instead of simple "sorry, something went wrong", Rails has a nice utility for the purpose.
Open the file app/controllers/application_controller.rb and you should find something like this:

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
endClicking "Copy Code" button will copy the code into the clipboard - memory. Please paste(Ctrl+V) it in your destination. The code will get pasted. Happy coding from Wikitechy - ruby on rails tutorial - rails guides - ruby rails - rubyonrails - learn ruby on rails - team

We can now add a rescue_from to recover from specific errors:

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  rescue_from ActiveRecord::RecordNotFound, with: :record_not_found

  private

  def record_not_found
    render html: "Record <strong>not found</strong>", status: 404
  end
endClicking "Copy Code" button will copy the code into the clipboard - memory. Please paste(Ctrl+V) it in your destination. The code will get pasted. Happy coding from Wikitechy - ruby on rails tutorial - rails guides - ruby rails - rubyonrails - learn ruby on rails - team

It's recommended not to rescue from Exception or StandardError otherwise Rails won't be able to display helpful pages in case of errors.

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