how do i display error messages in the web browser when using rails?
eg. if i use a variable in the view that i hasn't defined in the controller i want to get an error message.
thanks
+1
A:
In your controller:
def your_method
#processing that fails
flash[:notice] = 'your error message'
end
In your view:
<% if !flash[:notice].nil? %>
<p id="notice"><%= flash[:notice] %></p>
<% end %>
The documentation for the Flash hash is available here.
To rescue from errors at the application level rather than displaying error messages to the user, you can use
rescue_from ErrorType, :with => :action_method
Examples:
http://stackoverflow.com/questions/101012/customising-the-generic-rails-error-message
http://www.perfectline.co.uk/blog/custom-dynamic-error-pages-in-ruby-on-rails
Jim Schubert
2010-06-28 02:13:13
i meant more like errors that is generated by rails (maybe the view is using a variable that hasnt been defined)
never_had_a_name
2010-06-29 04:29:56
fayer. Thanks for the accept even though I didn't answer the question you were looking for. Your question was short and made it sound like a per-controller exception should be displayed as an error message. I updated my answer with a couple of references for how to show a customized error page based on exceptions in your controllers. The second link is a pretty good resource and shows how to catch errors and log, but you'll have to be careful that logging doesn't throw errors or you'll get locked in a loop.
Jim Schubert
2010-08-06 14:04:22
A:
When you have errors like the mentioned one, when you try to reach the respective page you should have an error message instead of the proper page.
dombesz
2010-06-28 13:05:18