Rails 3，fields_for 中的单选按钮组? [英] Rails 3, radiobutton group in fields_for?

问题描述

我认为这应该有点微不足道，但不知何故我一定做错了什么..而且我找不到任何谷歌结果证明我有任何好处的事实，我可能遗漏了一些点.我的主题几乎说明了一切:
如何制作在 fields_for 迭代中生成的单选按钮组.

I think this should be kinda trivial, but somehow I must be doing something wrong.. And the fact that I can't find any google results proving me any good, I might be missing some point. My subject almost says it all:
How can I make a radiobutton group that is generated in a fields_for iteration.

例如:

form_for @team do |t|
   f.fields_for :players |p|
       p.radio_button :is_captain, "is_captain_group"

其中 is_captain 是玩家模型上的布尔字段.上面的方法不行...

Where is_captain is a boolean field on the player model. The above method does not work...

如下所示，应该共享"单选按钮组的是fields_for中列出的所有球员 - 例如11名球员，只能选择一名队长.

As posted below, it is the all the listed players in the fields_for that should "share" the radio button group - e.g 11 players, only one can be selected captain.

推荐答案

更新:

然后你必须在团队模型上声明一个虚拟属性(例如:captain):

Then you have to declare a virtual attribute (e.g :captain) on the team model:

在视图上:

form_for @team do |t|
   f.fields_for :players |p|
       t.radio_button :captain, p.id

在 team.rb 上:

On team.rb:

def captain=(id)
  self.players.each do |player|
    player.is_captain = (player.id == id)
  end
end

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