module Opto::Model::Association::HasOne::Declaration::ClassMethods

Public Instance Methods

has_one(relation, klass, options = {}) click to toggle source
# File lib/opto/model/association/has_one/declaration.rb, line 13
def has_one(relation, klass, options = {})
  if relations.include?(relation)
    raise RuntimeError, "Duplicate has_one relation '#{relation}'"
  end
  relations << relation

  define_method relation do
    if instance_variable_defined?("@#{relation}")
      instance_variable_get("@#{relation}")
    else
      instance_variable_set("@#{relation}", Proxy.new(self, klass, relation, nil, options))
    end
  end

  define_method "#{relation}=" do |arg|
    if arg.kind_of?(klass) || arg.nil?
      instance_variable_set("@#{relation}", Proxy.new(self, klass, relation, arg, options))
    elsif arg.kind_of?(Hash)
      self.send(relation).new(arg)
    else
      raise TypeError, "Expected an instance of #{klass} or Hash or nil"
    end
  end
end