HABTM-Association Insert_sql

Question

Rails 3.2.3，Ruby 1.9.3p194

尝试使用与HABTM相关的子项目保存项目时，我会覆盖默认生成的SQL，并调用母项目的Name属性和每个关联的子项目。如何正确指定关联的子项目名称？ ＃{record.Name}，如示例所示，导致 NameError：        未定义的局部变量或＃

的方法`record'

has_and_belongs_to_many :subproject, :class_name => "Project",
:join_table => "project_subproject", :foreign_key => "projectname", :association_foreign_key => "subprojectname",
:finder_sql => proc { %{SELECT `project`.* FROM `project` INNER JOIN `project_subproject` ON `project`.`name` = `project_subproject`.`subprojectname` WHERE `project_subproject`.`projectname` = '#{self.Name}' } },
#TODO: find correct expression for insert sql
:insert_sql =>  proc { %{INSERT INTO `project_subproject` (`projectname`, `subprojectname`) VALUES ( "#{self.Name}","#{record.Name}" )} }

任何建议？

Answer 1

从Rails 3.1解决。发行说明：

以前：在has_and_belongs_to_many关联上的insert_sql和：delete_sql允许您调用'record'来获取插入或删除的记录。现在将其作为proc的参数传递。

因此：

:insert_sql =>  proc { |record| %{INSERT INTO `project_subproject` (`projectname`, `subprojectname`) VALUES ( "#{self.Name}","#{record.Name}" )} }