启用该插件需要熟悉Ruby语言，它允许通过ruby语句自定义工作流。例如：

满足预置条件后自动修改issue属性
自定义错误信息
可以自定义 observable object. 已经支持的observable object对象如下：

• Issue (before_save, after_save, before_destroy, after_destroy)
• Group (before_save, after_save, before_destroy, after_destroy)
• User (before_save, after_save, before_destroy, after_destroy)
• Project (before_save, after_save, before_destroy, after_destroy)
• Attachment (before_save, after_save, before_destroy, after_destroy)
• Wiki Content (before_save, after_save, before_destroy, after_destroy)
• Group Users (before_add, after_add, before_remove, after_remove)
• Issue Attachments (before_add, after_add, before_remove, after_remove)
• Project Attachments / Files (before_add, after_add, before_remove, after_remove)
• Wiki Page Attachments (before_add, after_add, before_remove, after_remove)
• <Shared code>

<Shared code> - 工作流的特殊类型，可以在其它工作流之前运行。同时提供额外的功能和函数，详细内容参考作者wiki介绍。

感谢 @Participaçãoes MZB HD 提供的redmine_custom_workflows用例手册 （#586）