Add namespace option to create nested constants

[palkan]

Make possible creation of namespaced models:

with_model :TestUser, namespace: Users, superclass: User

with_model :Test, namespace: MyModule, superclass: MyModule::Base

[amarshall]

Does with_model :"A::B" not work?

[amarshall]

Actually…it won’t. But for the same reason this P.R. won’t if the namespace isn’t already defined. (I think…it’s early—I’ll look into this further later.)

[amarshall]

This has been implemented in aa788c0. Will make a release sometime soon. I’ve implemented this a bit differently than your P.R.; instead, just provide the namespace in the name (e.g. with_model :'Foo::Bar'). The namespace does still need to already exist (with_model will not create it, as that feels, to me, overreaching). I think this API is perhaps a bit more intuitive than a separate option.

Sorry it took so long to get this feature in!

[amarshall]

@palkan This is now in v2.1.0.