Rails collection_select默认选项？ [英] Rails collection_select default option?

问题描述

所以我把一个集合选择。

 <％= collection_select：PriceRange，7 .where（'value> 0'），：value，：name％> 
  

我想获得默认选择为PriceRange，id为7，并且不依赖于任何用户设置，即其按照价格范围更改页面上显示的项目的表单的一部分。

  * * *更新的效果* * * 
  

我添加了

  @price_higher = PriceRange.find（7）
  

到处理视图的控制器，并添加

 ，{：selected = @ price_higher.value} 
  

它似乎做的伎俩，虽然是在寻找一个不太复杂的方法做所有内部的collection_select。

解决方案

添加：selected 选项。

示例：

  collection_select（：post，：author_id，Author.all，：id，：name_with_initial，{：selected =>whatever_value}）
  pre> 
 
 
示例来自： ApiDock  
 
 
 
在您的情况下：
 <％= collection_select：PriceRange， 7，PriceRange.where（'value> 0'），：value，：name，{：selected => whatever}％> 
  
 
so I'm putting together a collection select.
<%= collection_select :PriceRange, "7", PriceRange.where('value > 0'), :value, :name %>
I'm trying to get the default selection to be PriceRange with the id of 7, this is independent and doesn't rely on any of the users settings, its part of a form that changes the items displayed on the page by their price range.
* * * UPDATED EFFORTS * * *
I added
@price_higher = PriceRange.find(7)
to the Controller that handles the view, and added
, {:selected => @price_higher.value}
inside the collection_select. It seems to do the trick, although was looking for a less complicated way of doing it all inside the collection_select.
解决方案
Add the :selected option.

Example:
collection_select(:post, :author_id, Author.all, :id, :name_with_initial, {:selected => "whatever_value"})
Example took from: ApiDock

In your case:
<%= collection_select :PriceRange, "7", PriceRange.where('value > 0'), :value, :name, {:selected => "whatever"} %>


                        
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