Accessing a class's containing namespace from within a module
- by SFEley
I'm working on a module that, among other things, will add some generic 'finder' type functionality to the class you mix it into. The problem: for reasons of convenience and aesthetics, I want to include some functionality outside the class, in the same scope as the class itself.
For example:
class User
include MyMagicMixin
end
# Should automagically enable:
User.name('Bob') # Returns first user named Bob
Users.name('Bob') # Returns ALL users named Bob
User(5) # Returns the user with an ID of 5
Users # Returns all users
I can do the functionality within these methods, no problem. And case 1 (User.name('Bob')) is easy. Cases 2–4, however, require being able to create new classes and methods outside User. The Module.included method gives me access to the class, but not to its containing scope. There is no simple "parent" type method that I can see on Class nor Module. (For namespace, I mean, not superclass nor nested modules.)
The best way I can think to do this is with some string parsing on the class's #name to break out its namespace, and then turn the string back into a constant. But that seems clumsy, and given that this is Ruby, I feel like there should be a more elegant way.
Does anyone have ideas? Or am I just being too clever for my own good?
