class ActiveRecord::Associations::Builder::SingularAssociation

def self.define_constructors(mixin, name)

Defines the (build|create)_association methods for belongs_to or has_one association

def self.define_constructors(mixin, name)
  mixin.class_eval <<-CODE, __FILE__, __LINE__ + 1
    def build_#{name}(*args, &block)
      association(:#{name}).build(*args, &block)
    end
    def create_#{name}(*args, &block)
      association(:#{name}).create(*args, &block)
    end
    def create_#{name}!(*args, &block)
      association(:#{name}).create!(*args, &block)
    end
  CODE
end

Class Methods