Rails:查找所有条件

本文介绍了Rails:查找所有条件的处理方法，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

在我的应用中，我有来自不同国家/地区的用户，并希望对他们进行查找

in my app I have users from different countries and want to perform finds on them

我尝试在索引操作中这样做

I tried to do it like this in the index action

@fromcanada = User.find(:all, :country => 'canada')

但是我得到了错误

Unknown key: country

然而，这让我想问，什么可以成为钥匙?在我的数据库架构文件中，我在用户表上有一个国家"列.

However, so that leads me to ask, what can become a key? In my database schema file, I have a "country" column on the users table.

t.string "country"

此外，当我找到所有内容时

Furthermore, when I did a find all

@users = User.all

我能够做到这一点

<%= user.country %></p>

你能解释为什么我的 find all with conditions 不起作用吗?告诉我我应该怎么做?

Can you explain why my find all with conditions didn't work? and show me how I should have done it?

推荐答案

试试这个.

@fromcanada = User.find(:all, :conditions => { :country => 'canada' })

正如 jason328 所指出的，上述答案在 3.2 中已弃用，更新后的答案是

edit: As jason328 pointed out, the above answer is deprecated in 3.2, and an updated answer would be

@fromcanada = User.where(:country => 'canada')