如何在rescue_from中渲染500页

Question

I would like to send e-mail when having an exception in my application and render the regular 500 page. I could not find how to perform the 500 page render:

class ApplicationController < ActionController::Base
  rescue_from StandardError do
     send_email_of_error
     # what goes here? 
  end

  ...
end

Answer 1

Raising the exception again will likely to what you want:

rescue_from StandardError do |exception|
  send_email_of_error
  raise exception
end

You could also call render to render your own page, the docs have an example doing this.

But why reinvent the wheel? The exception notifier gem already does this and is customizable and tested.

Answer 2

This is an approach that maybe fits your needs:

class ApplicationController < ActionController::Base
  rescue_from Exception, :with => :render_500

  def render_500(exception)
    @exception = exception
    render :template => "shared/500.html", :status => 500
  end
end

Answer 3

Possibly, it can be useful to look on sentry, what makes notifications automatically with bunch of information in system.

gem https://github.com/getsentry/raven-ruby

demo https://github.com/getsentry/sentry-demo