Rails resce_from setting error page

1. If the activerecord find method is set, no error is returned. Call a method to display the 404 page.

class ApplicationController < ActionController::Base  rescue_from ActiveRecord::RecordNotFound, :with => :record_not_found  def record_not_found    render ‘record_not_found‘    # ....    true  endend

2. Set 500 page

rescue_from RuntimeError, with: :render_errordef render_error     render ‘error_500‘, status: 500, layout: ‘public‘end

3. For other error pages, you can write them to a method.

def self.rescue_errors    rescue_from Exception, with: :render_error    rescue_from RuntimeError, with: :render_error    rescue_from ActionController::UnknownController, with: :render_not_found    rescue_from ActionController::UnknownAction, with: :render_not_foundendrescue_errors unless Rails.env.development?