I would like to raise an exception so that it does the same thing a normal Rails exception does. Specially, show the exception and stack trace in development mode and show "We're sorry, but something went wrong" page in production mode.
I tried the following:
raise "safety_care group missing!" if group.nil?
But it simply writes "ERROR signing up, group missing!" to the development.log file
This question is related to
ruby-on-rails
exception
exception-handling
You don't have to do anything special, it should just be working.
When I have a fresh rails app with this controller:
class FooController < ApplicationController
def index
raise "error"
end
end
and go to http://127.0.0.1:3000/foo/
I am seeing the exception with a stack trace.
You might not see the whole stacktrace in the console log because Rails (since 2.3) filters lines from the stack trace that come from the framework itself.
See config/initializers/backtrace_silencers.rb in your Rails project
You can do it like this:
class UsersController < ApplicationController
## Exception Handling
class NotActivated < StandardError
end
rescue_from NotActivated, :with => :not_activated
def not_activated(exception)
flash[:notice] = "This user is not activated."
Event.new_event "Exception: #{exception.message}", current_user, request.remote_ip
redirect_to "/"
end
def show
// Do something that fails..
raise NotActivated unless @user.is_activated?
end
end
What you're doing here is creating a class "NotActivated" that will serve as Exception. Using raise, you can throw "NotActivated" as an Exception. rescue_from is the way of catching an Exception with a specified method (not_activated in this case). Quite a long example, but it should show you how it works.
Best wishes,
Fabian
If you need an easier way to do it, and don't want much fuss, a simple execution could be:
raise Exception.new('something bad happened!')
This will raise an exception, say e with e.message = something bad happened!
and then you can rescue it as you are rescuing all other exceptions in general.
Source: Stackoverflow.com