枚举，如何在simple_form中显示多个单词？

Question

我正在为 :discount_type 使用枚举。枚举是 percent 或 price。

为了清楚起见，我想在枚举 price 的 simple_form 中显示 price per day。我该怎么做？

代码

型号

enum discount_type: { percent: 1, price: 0 }

表格

<%= f.input :discount_type, collection: ['percent', 'price'] %>

上次尝试

model
enum discount_type: { percent: 1, price_per_day: 0 }

form
<%= f.input :discount_type, collection: ['percent', 'price per day'] %>

error message:
==> 'price per day' is not a valid discount_type

Answer 1

来自文档：

The mappings are exposed through a class method with the pluralized attribute name, which returns the mapping in a HashWithIndifferentAccess...

这有点难看，因为 per day 添加到 price:

Model.discount_types.transform_keys { |key| key == 'price' ? 'price per day' : key }.keys
# ["percent", "price per day"]

因此，在您的表单中：

<%= f.input :discount_type, collection: Model.discount_types.transform_keys { |key| key == 'price' ? 'price per day' : key }.keys %>