Module: Autodeps::Persistency::ClassMethods

Defined in:
lib/autodeps/persistency.rb

Instance Method Summary collapse

Instance Method Details

#depend_on(clazz, options = {}) ⇒ Object 



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# File 'lib/autodeps/persistency.rb', line 17

def depend_on(clazz, options={})
  clazz = Object.const_get(clazz) if clazz.is_a?(String)
  options[:key_mapping] ||= {:id => (clazz.name.underscore.gsub(/^.*\//,"") + "_id").to_sym}
  class << clazz
    attr_accessor :_deps, :_autodeps_after_save_callbacked
  end
  clazz._deps ||= {}

  # options[:value_mapping].keys.sort?
  (clazz._deps[options[:value_mapping].keys.sort] ||= []) << Mapping.new(self, options[:key_mapping], options[:value_mapping] )

  Autodeps.autorun do

  end
  if !clazz._autodeps_after_save_callbacked
    clazz._autodeps_after_save_callbacked = true
    clazz.send(:after_save) do
      clazz._deps.each do |attribute_keys, values|
        if attribute_keys.any? {|attribute_key| self.send("#{attribute_key.to_s}_changed?")}
          values.each do |mapping|
            relation = mapping.dependent
            mapping.key_mapping.each do |source_key, target_key|
              relation = relation.where(target_key => self.send(source_key))
            end

            relation.each do |tuple|
              mapping.value_mapping.each do |source_key, target_key|
                tuple[target_key] = self.send(source_key)
              end
              tuple.save
            end
          end
        end
      end

    end
  end
end