rails collection

本文介绍了rails collection_select 与 select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

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)