Module: Arrest::BelongsTo::BelongsToMethods

Defined in:
lib/arrest/attributes/belongs_to.rb

Instance Method Summary collapse

Instance Method Details

#belongs_to(*args) ⇒ Object 



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# File 'lib/arrest/attributes/belongs_to.rb', line 28

def belongs_to(*args)
  arg = args[0]
  name = arg.to_s.downcase
  class_name = StringUtils.classify(name)
  foreign_key = "#{StringUtils.underscore(ClassUtils.simple_name(self))}_id"
  params = args[1] unless args.length < 2

  if params
    params[:actions] = [:retrieve] if params[:read_only] # read_only is the short form for [:retrieve]

    actions = params[:actions] if params[:actions]
    polymorphic = !!params[:polymorphic]
    class_name = params[:class_name].to_s unless params[:class_name] == nil
    foreign_key = params[:foreign_key].to_s unless params[:foreign_key] == nil
  end

  actions ||= [:create, :retrieve, :update, :delete]

  field_name = create_field_name(name, params, polymorphic)

  create_and_add_attribute(field_name, polymorphic, actions, foreign_key, class_name)

  send :define_method, name do
    val = self.send(field_name)
    if val.blank?
      return nil
    end

    @belongs_tos ||= {}
    @belongs_tos[name] ||=
      begin
        if polymorphic
          clazz = self.class.json_type_to_class(val.type)
          id = val.id
        else
          clazz = Arrest::Source.class_loader.load(class_name)
          id = val
        end
        clazz.find(self.context, id)
      end

  end
end

#create_and_add_attribute(field_name, polymorphic, actions, foreign_key, class_name) ⇒ Object 



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# File 'lib/arrest/attributes/belongs_to.rb', line 20

def create_and_add_attribute(field_name, polymorphic, actions, foreign_key, class_name)
  if polymorphic
    add_attribute(PolymorphicAttribute.new(field_name.to_sym, actions))
  else
    add_attribute(BelongsToAttribute.new(field_name.to_sym, actions, :String, foreign_key, class_name))
  end
end

#create_field_name(name, params, polymorphic) ⇒ Object 



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# File 'lib/arrest/attributes/belongs_to.rb', line 10

def create_field_name(name, params, polymorphic)
  if (params && params[:field_name])
    params[:field_name]
  elsif polymorphic
    "#{name}_ref"
  else
    "#{name}_id"
  end
end