AngularJS and Rails: Error detected - provider 'e' is unknown

Upon transitioning to the production server utilizing Rails 4 and AngularJS, I encountered an error: 

[$injector:modulerr] Failed to instantiate module EcoApp due to:
Error: [$injector:unpr] Unknown provider: e
. After exploring various Stack Overflow threads and Angular documentation, it seems that the issue stems from minification. Despite my efforts to troubleshoot the code in my controller file (written in CoffeeScript), specifically focusing on NavbarIsActive, I haven't been successful in resolving the issue. This led me to seek assistance here as my knowledge of Angular is limited. Your guidance and support would be greatly appreciated!

javascriptangularjsruby-on-rails-4coffeescript

Answer №1

It is probable that the issue lies in minification. When a minifier scrambles your code to something like this:

.controller('Foobar', function (e) { .. })

Angular does not have clear information on what it needs to inject in this case. This is why an alternative injection syntax exists, which should be used consistently:

.controller 'Foobar', ['$scope', '$location', ($scope, $location) ->
    ..
]

You must specify each dependency twice: once as a string to prevent it from being minified, and once again as a variable within your function signature.

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