options_for_select 选定的值不起作用

问题描述

我有一个projectuser 数据表单，但是当我编辑projectuser 时，选中的projectuser 保持为空，这是怎么回事?这是代码:

I have a form for projectuser data, but when I edit the projectuser, the selected projectuser stays empty, what is going wrong? This is the code:

= f.select :user_id, options_for_select(@users.map{ |u| [u.full_name, u.id] }, selected: @projectuser.full_name), include_blank: true

推荐答案

文档说明:

(...) 
options_for_select(container, selected = nil) public
(...)
(million examples)

所以你不应该传递selected: something，而只是something.此外，这需要选择值，而不是文本:

So you shouldn't pass selected: something, but just something. Also, this something needs to be selected value, not text:

= f.select :user_id, options_for_select(@users.pluck(:name, :id), @projectuser.id), include_blank: true

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