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Size: 1018 Bytes
Versions: 22
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Stored size: 1018 Bytes
Contents
module DataMapper
module Types
class Discriminator < DataMapper::Type
primitive Class
track :set
default lambda { |r,p| p.model }
nullable false
def self.bind(property)
model = property.model
model.class_eval <<-EOS, __FILE__, __LINE__
def self.descendants
(@descendants ||= []).uniq!
@descendants
end
after_class_method :inherited, :add_scope_for_discriminator
def self.add_scope_for_discriminator(retval, target)
target.descendants << target
target.default_scope.update(#{property.name.inspect} => target.descendants)
propagate_descendants(target)
end
def self.propagate_descendants(target)
descendants << target
superclass.propagate_descendants(target) if superclass.respond_to?(:propagate_descendants)
end
EOS
end
end # class Discriminator
end # module Types
end # module DataMapper
Version data entries
22 entries across 22 versions & 6 rubygems