association_accessor_methods

# File activerecord/lib/active_record/associations.rb, line 705
        def association_accessor_methods(association_name, association_class_name, association_class_primary_key_name, options, association_proxy_class)
          define_method(association_name) do |*params|
            force_reload = params.first unless params.empty?
            association = instance_variable_get("@#{association_name}")
            if association.nil? or force_reload
              association = association_proxy_class.new(self,
                association_name, association_class_name,
                association_class_primary_key_name, options)
              retval = association.reload
              unless retval.nil?
                instance_variable_set("@#{association_name}", association)
              else
                instance_variable_set("@#{association_name}", nil)
                return nil
              end
            end
            association
          end

          define_method("#{association_name}=") do |new_value|
            association = instance_variable_get("@#{association_name}")
            if association.nil?
              association = association_proxy_class.new(self,
                association_name, association_class_name,
                association_class_primary_key_name, options)
            end
            association.replace(new_value)
            unless new_value.nil?
              instance_variable_set("@#{association_name}", association)
            else
              instance_variable_set("@#{association_name}", nil)
              return nil
            end
            association
          end

          define_method("set_#{association_name}_target") do |target|
            return if target.nil?
            association = association_proxy_class.new(self,
              association_name, association_class_name,
              association_class_primary_key_name, options)
            association.target = target
            instance_variable_set("@#{association_name}", association)
          end
        end