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

Calling redirect_to doesn't return from your action method which is why moving on to the respond_to block causes the DoubleRenderError. One way to fix that is with:

redirect_to :controller => "main", :action => "index" and return

However, a better solution might be to either rescue from this exception declaratively or just let it propagate to the client. The former look like this:

class YourController < ActionController::Base

  rescue_from ActiveRecord::RecordNotFound, with: :dude_wheres_my_record

  def show
    # your original code without the begin and rescue
  end

  def dude_where_my_record
    # special handling here
  end
end

If you just let the exception fester the user will see the public/404.html page in production mode.