Rails的collection_select帮助器方法和“Create item”选项 [英] Rails' collection_select helper method and the "Create item" option at the end

问题描述

是否可以在创建的< select> 结尾处添加< option> collection_select 辅助方法？

现在我有

  f.collection_select（：category_id，@categories，：id，：name，{：prompt =>'请选择一个类别'}）
  

它会产生

 < select id =product_category_idname =product [category_id]> 
< option value =>请选择一个类别< / option> 
< option value =7> category one< / option> 
< option value =8>类别2< / option> 
< / select> 
  

和我想要的是

 < select id =product_category_idname =product [category_id]> 
< option value =>请选择一个类别< / option> 
< option value =7> category one< / option> 
< option value =8>类别2< / option> 
< option value =new> ..或创建一个新的< / option> 
< / select> 
  

这是可能的还是应该循环访问并手动生成选项？

解决方案

您应该使用 select 来代替。

像这样：

  f.select（：category_id，@ categories.collect {| p | [p .name，p.id]} + [['或创建一个新的'，'new']]，{：include_blank =>'请选择一个类别'}）
  
 
 
 
祝你好运！
 
Is it possible to add an <option> at the end of a <select> created with the collection_select helper method?

Right now I have 
f.collection_select(:category_id , @categories, :id, :name, {:prompt => 'Please select a category'})
which generates
<select id="product_category_id" name="product[category_id]">
  <option value="">Please select a category</option>
  <option value="7">category one</option>
  <option value="8">category 2</option>
</select>
and what I would like is
<select id="product_category_id" name="product[category_id]">
  <option value="">Please select a category</option>
  <option value="7">category one</option>
  <option value="8">category 2</option>
  <option value="new">..or create a new one</option>
</select>
Is this possible or should I just loop through the collection and generate the options manually?
解决方案
You should probably use select instead.

Like so:
f.select(:category_id, @categories.collect {|p| [ p.name, p.id ] } + [ [ 'Or create a new one', 'new' ] ], {:include_blank => 'Please select a category'})
Good luck!

                        
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