如何将模型的整数属性映射到字符串？ [英] How to map a model's integer attribute to a string?

问题描述

我的数据库中有一个Hotels表，其中一列是：status （ integer ）。我想将这些整数转换为字符串，因此 1 =正在等待合同 ， 2 =设计 等等...

I have a Hotels table in my database, and one of the columns is :status (integer). I'm looking to convert these integers into strings, so 1 = "Awaiting Contract", 2 = "Designing" and so on...

我已经在Stack上搜索了一些答案，而缺少答案的确使我觉得我从错误的角度来解决这个问题？我曾经在PHP中同时提取数据。

I have searched Stack for some answers, and the lack of them makes me think that I'm coming at this problem from the wrong angle? I used to do this in PHP whilst pulling the data. New-ish to Rails so any help, or best practise advice would be much appreciated.

推荐答案

检查 ActiveRecord 的枚举-文档。

在这里您可以配置：status ：

class Hotel < ActiveRecord::Base
  enum status: { waiting_contract: 1, designing: 2 }

  def format_status
    status.to_s.humanize
  end
end

它将创建如下方法：

hotel.waiting_contract?
hotel.designing?

hotel.waiting_contract!
hotel.format_status # => "Waiting contract"

希望有帮助！

更新

相似的功能可能是通过覆盖 status 方法本身来实现的，

Similar functionality might be achieved by overriding the status method itself, although having separate methods is more advised:

class Hotel < ActiveRecord::Base
  enum status: { waiting_contract: 1, designing: 2 }

  def status
    super.to_s.humanize
  end
end

此外，装饰器是您应使用的针对特定视图的方法。

Furthermore, decorators are something you should look into for view-specific methods.

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