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Rails Forum - Ruby on Rails Help and Discussion Forum » Controllers and Views » ActionController::Base
If I have a code like this:
class myClass < ActionController::Base
Some code
end
What does the :: signify? I have tried to find reference for this in my Agile Development book, but I can't find anything.
I'm also presuming that the < means that the class myClass inherits from ActionController::Base, I just don't understand the ::
The :: signifies that Base is a class inside the ActionController module. In Rails, classes are grouped inside modules to give them a namespace. This way there can be other classes called "Base" in other modules and there won't be any conflict.
Actually shouldn't it be ActiveRecord::Base?
Actually shouldn't it be ActiveRecord::Base?
That depends. If your class above is a model, then yes it should be ActiveRecord::Base.
In a typical app, the ApplicationController will be the only controller that inherits from ActionController::Base. All other controllers will inherit from ApplicationController instead, like so:
class PicturesController < ApplicationController
def index
...
end
end
ok I think i'm getting it.
So to reiterate, the double colon means that the keyword following it is a class that is exclusive to the keyword preceeding the double colon.
Roughly, yes. It can also be multiple modules deep:
class Klass < Foo::Bar::Blah
end
i've been on the ruby site and it was interesting.
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