pragmatist
Patrick Joyce

September 19, 2007

Confusing Rails Error Message


ArgumentError: Admin is not missing constant UsersController!
    method load_missing_constant in dependencies.rb at line 240
    method const_missing in dependencies.rb at line 452
    method send in dependencies.rb at line 470
    method const_missing in dependencies.rb at line 470
    method setup_without_fixtures in users_controller_test.rb at line 11
    method setup in fixtures.rb at line 576

Note to self: the above error message normally means that you are missing the scope prefix and the :: operator. So in the above example the error would be fixed by prepending “Admin::” to the reference to the class “UsersController” on line 11 of users_controller_test.rb.

More Articles on Software & Product Development

Agile With a Lowercase “a”
”Agile“ is an adjective. It is not a noun. It isn’t something you do, it is something you are.
How Do You End Up With A Great Product A Year From Now?
Nail the next two weeks. 26 times in a row.
Build it Twice
Resist the urge to abstract until you've learned what is general to a class of problems and what is specific to each problem.