Rails的4.1枚举错误where条件

问题描述

今天，我要改变我的Postgres枚举的Rails 4.1枚举。我做了一些步骤。

Today i want change my Postgres enum to Rails 4.1 enum.I make some steps.

迁移：

 create_table :users do |t|
   # other column here
   t.column :status, :integer
 end

模型：

class User < ActiveRecord::Base
  enum status: [ :local, :tourist ]
end

现在创建用户：

  => User.create(email: '[email protected]', password: '12345678', status: 'local')
  => #<User id: "53621ec84d6163124", email: "[email protected]", status: 0, ......>
  => u = User.last
  => User Load (0.9ms)  SELECT  "users".* FROM "users" ........
  => #<User id: "53621ec84d6163124", email: "[email protected]", status: 0, ......>
  => u.local?
  => true

尝试找到本地用户（现在我有我的枚举奇怪的行为）：

Try find local users(and now i have strange behavior of my enum):

  => User.where("status <> ?", User.statuses[:local])
  => User Load (0.9ms)  SELECT "users".* FROM "users"  WHERE (status <> 0)
  => []

跆拳道？

  => User.where("status <> ?", User.statuses[:tourist])
  => User Load (0.9ms)  SELECT "users".* FROM "users"  WHERE (status <> 1)
  => #<User id: "53621ec84d6163124", email: "[email protected]", status: 0, ......>

所以问题，这个查询 User.where（状态＆LT;＆GT;，User.statuses [：本地]）应该返回我的本地用户。还是我做错了什么？

So problem, this query User.where("status <> ?", User.statuses[:local]) should return my local user. Or i doing something wrong?

推荐答案

您在这里使用了错误的操作符。

You are using a wrong operator here.

"status <> ?" equals  "status != ?"

相反，你要使用

Instead you want to use

"status = ?"

Postgres的比较操作

这篇关于Rails的4.1枚举错误where条件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！