custom exceptions when rescued gives a name error?

Question

I am trying to raise myExceptions in a service in rails.

But when i rescue with specific name of exception it gives me a nameError for the exception called.

status": 500,
"error": "Internal Server Error",
"exception": "#<NameError: uninitialized constant Api::V1::UsersController::CustomExceptions>",
"traces": {

Exceptions File:

module CustomExceptions
  class EmptyObject < StandardError; end
  class WrongParams < StandardError; end
  class Unauthorized < StandardError; end
end

Exception Raised:

class UsersService
class << self
    include AuthenticationHelper
    def find_users(current_user, query_params)          
        users = User.where(some query)
        if users.count > 0
            users
        else
            raise CustomExceptions::EmptyObject, "empty user object returned"
        end
    end
end
end

rescue in controller:

 rescue CustomExceptions::EmptyObject => error
  render json: {error: 'No users found'}, status: 404
end

Answer 1

Because you define CustomExceptions, so Rails expect you to define that class in file custom_exceptions.rb.

In order to call CustomExceptions, you should rename the filename.