Create exception accessible from both Model and Controller in rails 4

Question

I simply want to create a custom exception that I can use as part of a fail from either a model or a controller. Is the lib directory the correct place for this, or are helpers / concerns useful for this.

If it is the lib directory what do I need to import and where?

pdobb · Accepted Answer · 2014-05-23 13:36:04Z

1

You should add the exception class to your app/models folder. Anything that's business logic for your application should be in the app/models folder (as this article talks about in more detail). The lib folder is where you put code that is basically external to your app (almost like the last step before you extract it into a gem some day).

Here is an example exception that you can refer to from anywhere in your app:

# app/models/my_exception.rb
class MyException < RuntimeError
end

And since the app/models folder is already autoloaded you're all set -- no need to require the file in an initializer or anything like that.

edited May 23, 2014 at 13:36

answered May 23, 2014 at 12:55

pdobb

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3 Comments

Imran Over a year ago

Thanks, will try that out when I get the chance!

Imran Over a year ago

Hey this isn't working for me... I'll change the question above to reflect that

pdobb Over a year ago

@Imran I see you accepted it, did it start working now?

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