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Forked from lazyatom/gist:217001
Created October 26, 2009 13:51
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# I'm creating some classes and modules on the fly, but things aren't hooking up quite the way I'd hoped.
# Can anyone explain why when an instance of Mod::Sibling tries to call Child.cry, that it
# doesn't call Mod::Child.cry, but instead looks for Behaviour::Child?
class Base
def self.cry
"#{self.name}.cry called!"
end
end
module Behaviour
def blame
puts "I am #{self}, a #{self.class.name}, trying to call Child.cry"
Child.cry
end
end
module Mod
class Child < Base
end
end
Mod::Child.cry # => "Mod::Child.cry called!"
Mod::Child.name # => "Mod::Child"
module Mod
class Sibling < Base
include Behaviour
end
end
Mod::Sibling.name # => "Mod::Sibling"
Mod.constants # => ["Child", "Sibling"]
sibling = Mod::Sibling.new
sibling.blame # =>
# ~> -:10:in `blame': uninitialized constant Behaviour::Child (NameError)
# ~> from -:32
# >> I am #<Mod::Sibling:0x1973078>, a Mod::Sibling, trying to call Child.cry
# I'm creating some classes and modules on the fly, but things aren't hooking up quite the way I'd hoped.
# Can anyone explain why when an instance of Mod::Sibling tries to call Child.cry, that it
# doesn't call Mod::Child.cry, but instead looks for Behaviour::Child?
class Base
def self.cry
"#{self.name}.cry called!"
end
end
module Behaviour
def blame
puts "I am #{self}, a #{self.class.name}, trying to call Child.cry"
Child.cry
end
end
child = Class.new(Base)
Mod = Module.new
Mod.const_set(:Child, child)
child.cry # => "Mod::Child.cry called!"
Mod::Child.cry # => "Mod::Child.cry called!"
child.name # => "Mod::Child"
sibling = Class.new(Base)
sibling.class_eval do
include Behaviour
end
Mod.const_set(:Sibling, sibling)
sibling.name # => "Mod::Sibling"
Mod.constants # => ["Child", "Sibling"]
sibling = Mod::Sibling.new
sibling.blame # =>
# ~> -:10:in `blame': uninitialized constant Behaviour::Child (NameError)
# ~> from -:32
# >> I am #<Mod::Sibling:0x1973078>, a Mod::Sibling, trying to call Child.cry
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