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module Plant
module Reflection
@@reflections = {}
def self.reflect klass
return if @@reflections[klass]
associations = lambda {|klass, macro| klass.reflect_on_all_associations(macro).map{|association| association.name} || []}
reflection = @@reflections[klass] = Hash.new
[:has_many, :has_one, :belongs_to].each {|relation| reflection[relation] = associations.call(klass, relation)}
reflection[:attributes] = klass.new.attributes
end
def self.clone object, id
clone = object.class.new
cloner = Proc.new {|attribute| clone.send(attribute.to_s + "=", object.send(attribute))}
reflection = @@reflections[object.class]
reflection[:attributes].keys.each(&cloner)
[:has_many, :has_one, :belongs_to].each {|relation| reflection[relation].each(&cloner)}
clone.id = id
clone
end
def self.has_many_association? klass, method
@@reflections[klass][:has_many].include?(method)
end
def self.has_one_association? klass, method
@@reflections[klass][:has_one].include?(method)
end
def self.foreign_key object, association
object.class.name.underscore + '_id'
end
end
end