在Ruby on Rails中使用多态的替代方案(Alternatives to use polymorphism in Ruby on Rails)

 我目前正在编写一些Intranet Web应用程序，用户可以向管理员提交添加不同资源的请求。 示例请求将是： 
 
 
 
 安装程序，在这种情况下，用户将选择他想要安装的程序 
 
 
 增加配额，在这种情况下，用户只需输入他需要的磁盘空间量，或者他可以选择预定义数量 - 1GB，10GB等。 
 
 
 创建新的电子邮件别名，在这种情况下，用户将只输入别名。 
 
 
 ... 
 
 
 我在考虑只有一个UserRequests模型，引用发送者和两个可选属性，一个是reference_id，它会反映到其他表（例如他希望安装的程序），另一个将用于免费类型字段，如电子邮件别名或配额。 
 
 所以我的问题是，根据模型应该包含的请求类型： 
 
 
 
 参考其他表格 
 
 
 整数数据 
 
 
 字符串数据 
 
 
 根据请求的类型，应该采取给定的操作 - 可能会从rails中添加电子邮件别名，但用户计算机上的应用程序将手动安装。 
 
 有没有人有类似的问题？ 你认为使用多态这种东西是一个好主意吗？ 你对如何在表格中组织数据有任何建议吗？ 

I'm currently writing some intranet web application where people could submit to admins requests for adding different resources. The example requests would be:
 
 
 
installing programs, in this case user will select which program he wants installed
 
 
increasing quota, in this case user will just enter the amount of disk space he needs or maybe he will select the predefined quantities - 1GB, 10GB etc...
 
 
create new email alias, in this case user will just type the alias.
 
 
...
 
 
I was thinking about having just one model UserRequests with the reference to the sender and two optional attributes one would be reference_id that would refefrence to other tables (for example the Program that he wants installed) and another would be used for free type fields like email alias or quota. 
 
So my problem is that based on the type of the request the model should contain either:
 
 
 
reference to other table
 
 
integer data 
 
 
string data
 
 
Based on the type of the request the given action should be taken - probably email alias could be added from rails but the application on users computer will be installed by hand.
 
Does anyone had similar problem? Do you think using polymorphism for this kind of stuff is a good idea? Do you have any suggestions on how to organize data in the tables?

原文：https://stackoverflow.com/questions/926230