检查默认选择值标签！
我有一个问题。这是代码！
f.select(:departments,Department.all.collect{|c|[c.name,c.id]},{},:size=>10,:multiple => ture)
class Emergency
has many :departments
end
html源是这样的：
<select id="emergency_departments" multiple="multiple" name="emergency[departments][]" size="10"><option value ="">""</option>....</select>
现在我想获得默认选择的标签，谁能告诉我怎么做？
I have a question.Here is the code!
f.select(:departments,Department.all.collect{|c|[c.name,c.id]},{},:size=>10,:multiple => ture)
class Emergency
has many :departments
end
the html source like this:
<select id="emergency_departments" multiple="multiple" name="emergency[departments][]" size="10"><option value ="">""</option>....</select>
now I want to get the default selected tag , who can tell me how ?
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
您想找到所选选项的值吗？是这样吗？
如果是这样，并且您了解一些 JQuery，那么您可以这样做：
You want to find the value of the option selected? Is that right?
If so, and you know your way around a bit of JQuery, this is how you do it:
现在我知道问题了，我使用标签“collection_select”来解决这个问题。它的方法是这样的，
f.collection_select(:部门,部门.all,:id,:名称,)
Now I know the question , i used the tag "collection_select" to solve this problem.Its method like this,
f.collection_select(:departments,Department.all,:id,:name,)