Always use proxy param_key when building forms

[sindrenm]

This fixes issue #3423 by always using the proxy param_key method from ActiveAdmin::Resource::Name.

[coveralls]

Coverage decreased (-0.14%) when pulling 2f60776 on sindrenm:3423-use-proxy-param-key into 6472173 on activeadmin:master.

[sindrenm]

Sooo, this passes on Rails 3.2.19 but fails on 4.1.5. Oh well.

[dmitry]

Can you please include specs?

[sindrenm]

@dmitry: Is this something you want specs for? I certainly don't want to spec the delegate method, that's already been specced by someone else. And I don't really want to spec that I call the delegate method either, as that is implementation specific and would break if we changed the implementation to something like this (even though it would still work):

def param_key
  resource_name.param_key
end

[timoschilling]

@sindrenm That @dmitry ask for specs, is not about specing delegate, its about to show that all use cases for param_key works. Please revert your merges, use rebase on master instead and bring it to run on each version.

[timoschilling]

I'm going to close this, see #3423 for the reasons.