Module: Subroutine::Association::ClassMethods

Defined in:
lib/subroutine/association.rb

Instance Method Summary collapse

Instance Method Details

#association(field, options = {}) ⇒ Object

Other options:

  • unscoped => set true if the record should be looked up via Type.unscoped



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# File 'lib/subroutine/association.rb', line 49

def association(field, options = {})

  if options[:as] && options[:foreign_key]
    raise ArgumentError.new(":as and :foreign_key options should be provided together to an association invocation")
  end

  class_name = options[:class_name]

  poly = options[:polymorphic] || !class_name.nil?
  as = options[:as] || field
  unscoped = !!options[:unscoped]

  klass = class_name.to_s if class_name

  foreign_key_method = (options[:foreign_key] || "#{field}_id").to_s
  foreign_type_method = foreign_key_method.gsub(/_id$/, "_type")


  if poly
    string foreign_type_method
  else
    class_eval <<-EV, __FILE__, __LINE__+1
      def #{foreign_type_method}
        #{as.to_s.camelize.inspect}
      end
    EV
  end

  integer foreign_key_method

  field_without_associations as, options.merge(association: true)

  class_eval <<-EV, __FILE__, __LINE__+1
    def #{as}_with_association
      return @#{as} if defined?(@#{as})
      @#{as} = begin
        #{as}_without_association ||
        polymorphic_instance(#{klass.nil? ? foreign_type_method : klass.to_s}, #{foreign_key_method}, #{unscoped.inspect})
      end
    end

    def #{as}_with_association=(r)
      @#{as} = r
      #{poly || klass ? "params['#{foreign_type_method}'] = r.nil? ? nil : #{klass.nil? ? "r.class.name" : klass.to_s.inspect}" : ""}
      params['#{foreign_key_method}'] = r.nil? ? nil : r.id
      r
    end
  EV

  alias_method :"#{as}_without_association", :"#{as}"
  alias_method :"#{as}", :"#{as}_with_association"

  alias_method :"#{as}_without_association=", :"#{as}="
  alias_method :"#{as}=", :"#{as}_with_association="

end

#field_with_associations(*args) ⇒ Object 



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# File 'lib/subroutine/association.rb', line 16

def field_with_associations(*args)
  opts = args.extract_options!
  if opts[:association]
    args.each do |arg|
      association(arg, opts)
    end
  else
    field_without_associations(*args, opts)
  end
end