how to handle ActiveRecord::RecordNotFound in rails controller?

Question

I have an app with user and events. Each user has several events. When a user wants to see a specific event he will get to this action:

def show
  begin
    @use         


        

Answer 1

In application controller, please write:

    rescue_from (ActiveRecord::RecordNotFound) { |exception| handle_exception(exception, 404) }

   protected

    def handle_exception(ex, status)
        render_error(ex, status)
        logger.error ex   
    end

    def render_error(ex, status)
        @status_code = status
        respond_to do |format|
          format.html { render :template => "error", :status => status }
          format.all { render :nothing => true, :status => status }
       end
    end

Create a page error.html.erb

  

    <%= t "errors.#{@status_code}.heading" %>
    <%= t "errors.#{@status_code}.subheading" %>
  

<%= t "errors.#{@status_code}.description" %>
<% if defined? root_path %>
  <%= link_to t(:return_to_home), root_path %>
<% end %>

and in en.yml

en:
  errors:
    "404":
      description: "The page you are looking for does not exist!"
      heading: "Record not found"
      subheading: ""