Module: E9Attributes::Model::ClassMethods

Defined in:
lib/e9_attributes/model.rb

Instance Method Summary collapse

Instance Method Details

#has_record_attributes(*attributes) ⇒ Object

By default, it reformats the attributes passed into association names and defines them. To add a record attribute without defining an association name, pass the association names literally and specify the option :skip_name_format. This will cause the method to skip adding associations for any attribute not ending in “_attributes”, which you must add manually, e.g.

has_many :users
accepts_nested_attributes_for :users, :allow_destroy => true



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# File 'lib/e9_attributes/model.rb', line 16

def has_record_attributes(*attributes)
  options = attributes.extract_options!
  options.symbolize_keys!

  class_inheritable_accessor :record_attributes

  attributes.flatten!
  attributes.map!(&:to_s)

  unless options[:skip_name_format]
    attributes.map! do |a|
      a = a.classify
      a = a =~ /Attribute$/ ? a : "#{a}Attribute"
      a.constantize rescue next
      a.underscore.pluralize
    end.compact
  end

  self.record_attributes = attributes

  has_many :record_attributes, :as => :record

  self.record_attributes.select {|r| r =~ /attributes$/ }.each do |association_name|
    has_many association_name.to_sym, :class_name => association_name.classify, :as => :record
    accepts_nested_attributes_for association_name.to_sym, :allow_destroy => true, :reject_if => :reject_record_attribute?
  end
end