rails collection_select 与 select [英] rails collection_select vs. select
问题描述
collection_select
和 select
Rails 助手:我应该使用哪一个?
collection_select
and select
Rails helpers: Which one should I use?
我看不出这两种方式有什么不同.两个助手都获取一个集合并在选择标签内生成选项标签.是否存在 collection_select
比 select
更好的场景?或者我在这里缺少什么?
I can't see a difference in both ways. Both helpers take a collection and generates options tags inside a select tag. Is there a scenario where collection_select
is better than select
? or is anything I am missing here?
推荐答案
collection_select
旨在在项目列表是 ActiveRecord 对象数组时使用.collection_select
建立在 select
之上,因此当您需要显示对象集合而不是字符串数组时,这是一种方便的方法.
collection_select
is intended to be used when the list of items is an array of ActiveRecord objects. collection_select
is built on the top of select
so it's a convenient method when you need to display a collection of objects and not an array of strings.
collection_select(:post, :author_id, Author.find(:all), :id, :name)
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