在 collection_select 上使用大写
如果之前已经回答过这个问题，我就找不到它了。
我有以下内容：
= f.collection_select :sex_id, @sexes, :id, :name
在控制器中：
@sexes = Sex.all
性别全部以小写形式存储，如下所示：
id|name
1|steer
2|heifer
3|holstein
我需要它们以大写字母输出：
Steer
Heifer
Holstein
我尝试过：
= f.collection_select :sex_id, @sexes, :id, :name.capitalize
= f.collection_select :sex_id, @sexes, 'id', 'name'.capitalize
但它们不起作用，我真的没想到它们会，但在发布此内容之前必须尝试一下。
If this has been answered before I cannot find it.
I have the following:
= f.collection_select :sex_id, @sexes, :id, :name
and this in the controller:
@sexes = Sex.all
the sexes are all stored in lowercase, like this:
id|name
1|steer
2|heifer
3|holstein
I need them to output with Capital First letters:
Steer
Heifer
Holstein
I tried:
= f.collection_select :sex_id, @sexes, :id, :name.capitalize
= f.collection_select :sex_id, @sexes, 'id', 'name'.capitalize
but they do not work, and I didn't really expect them to, but had to try them before posting this.
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collection_select在每个对象上调用一个方法来获取选项值的文本。您可以在模型中添加一个新方法来获取正确的值：然后在视图中：
collection_selectcalls a method on each object to get the text for the option value. You can add a new method in the model to get the right value:then in the view:
您最初的尝试不起作用的原因是您尝试将代表字段名称而不是实际变量的符号或字符串大写。
您可以执行类似的操作，然后数据在发送到视图之前将被大写。
或者
The reason your initial attempt is not working is that you're attempting to capitalize a symbol or a string that represents the field name and not the actual variable.
You could do something like this and then the data would be capitalized before it's sent to the view.
or
在 RoR4 中执行此操作的更简单方法是使用 humanize< /a> 方法。因此，您的视图代码将如下所示：
不需要任何额外的方法！
The simpler way to do this in RoR4 would be to use the humanize method. So, your view code would look like this:
No need for any extra methods!