Rails：如何将空的“必需”属性添加到 radio_button_tag

Question

I'm trying to use a radio_button_tag to generate a radio-button tag like:

<input type="radio" ... required>

in order to add form validation (I'm using Foundation and trying to make use of the Abide library). The closest I can get is:

radio_button_tag 'my_radio', ... , required: ''

# => <input type="radio" ... required="required">

This seems to be good enough for Abide to work, but is there a way I can get what I want out of the Rails helper? I've tried required: true in place of required: '' but it behaves the same.

Answer 1

复制/粘贴没有字面上的答案，所以我提供了一个。

<%= radio_button_tag(:model_id, model.id, false, required: 'required') %>

Answer 2

As you can see here: https://github.com/rails/rails/blob/4de8851289077239ecc91473bdba30f8cf6727bb/actionview/lib/action_view/helpers/tag_helper.rb#L149

Rails just looks for the presence of a value with "if value". A blank string is considered a value since it isn't nil and that is what triggers rails to include that "required='required'" attribute.

Does Abide really need the tag to be blank? It looks like it may just be checking for the presence of the "required" attribute so it may not care if the attribute has a value or not.