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Contents
# http://coderrr.wordpress.com/2008/04/22/building-the-right-class-with-sti-in-rails/
module ActiveRecord::StiInstantiation
module ActMacro
def instantiates_with_sti
include InstanceMethods
extend ClassMethods
instantiates_with_sti?
end
def instantiates_with_sti?
included_modules.include?(ActiveRecord::StiInstantiation::InstanceMethods)
end
end
module InstanceMethods
end
module ClassMethods
def new(*args, &block)
options = args.first.is_a?(Hash) ? args.first : {}
type = options[:type] || options['type']
klass = type.is_a?(Class) ? type : type.constantize if type
if type and klass != self
raise "STI instantiation error: class #{klass.name} should be a descendant of #{self.name}" unless klass < self
klass.new(*args, &block)
else
super
end
end
end
end
ActiveRecord::Base.send :extend, ActiveRecord::StiInstantiation::ActMacro
Version data entries
7 entries across 7 versions & 2 rubygems