需要选择滑轨

本文介绍了需要选择滑轨的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我在rails视图中部分看到了这样的select标签:

I see such select tag in my rails view partial:

= f.select :shipping_id, options_for_select(["Select"] + @shippings.map{ |c| [c.name, c.id]}), :required => true

我不会做的是这样的: 如果是页面加载，则此选择仅显示请选择我:D"，并且我必须从选择中选择一些值，而不是此值(请选择我:D")，并且如果我已选择或默认为请选择我:D" "，我收到错误消息，或者类似的东西? 如果我单击此选择，它一定是占位符，哪个值隐藏了?我知道如何在jQuery中执行此操作，但想在Rails视图中执行

And what i wont to do is this: If page load's, this select show only "Select me please :D", and i must select some value from select, not this ("Select me please :D"), and if i have selected or default "Select me please :D", i get error, or something like this? It must be something like placeholder, which value hides, if i click on this select? I know how to do this in jQuery, but wanna do in rails view

推荐答案

= f.select :shipping_id, [["Select Me", "Value for Jquery to attach to"]] + @shippings.map{ |c| [c.name, c.id]}, {:required => true}

这是你的意思吗?