ruby - How can I create a custom exception in my Rails application? -

i trying create custom exceptions in rails, 've problem designed solution.

here i've done far:

-create in app/ folder folder named errors/ file exceptions.rb in it.

app/errors/exceptions.rb:

module exceptions     class apperror < standarderror; end end 

• in 1 of controllers, tried raise it:

raise exceptions::apperror.new("user not authorized")

but when call controller's action, here get:

nameerror (uninitialized constant exceptions::apperror  did mean? typeerror               keyerror               ioerror               eoferror   did mean? typeerror               keyerror               ioerror               eoferror ): 

i think don't have understood how create new directories , files, , use them.

i've read created in app dir, eager loaded, can't understand problem.

short version: rails' automated code loading - fact in case files contain exceptions doesn't matter (see guide on subject more details)

rails try load exceptions/app_error.rb, in of files on auto load path. because file naming doesn't match this, can't find definition , nameerror.

if don't care code reloading (and might not sort of content) can keep files require them in initialiser (ensure app/errors in load path):

require 'exceptions' 

if not you'll have rearrange files match. if add app/errors rails' autoload path , keep files is, should work. if don't want change autoload path you'd have mode somewhere in autoload path , ensure nesting of modules reflects organization on disk.

personally i'd stick these in lib , require them initialiser