如何在ActiveAdmin中正确配置Rails 4.1枚举 [英] How to Properly Configure Rails 4.1 Enums in ActiveAdmin

问题描述

在我的架构中：

  t.integerprivacy_level，默认值：0 
  

在我的模型中：

 枚举privacy_level：{privacy_private：0，privacy_trusted：1，privacy_public： 2} 
  

在我的ActiveAdmin注册文件中：

  index do 
列：privacy_level 
 default_actions 
 end 
 
 form do | f | 
 f.inputs编辑我的模型do 
 f.input：privacy_level 
 end 
 f.actions 
 end 
  

在ActiveAdmin索引页上，它的效果很好。每个对象的隐私级别显示为privacy_private，privacy_trusted和privacy_public。

但是，当我尝试编辑对象时，输入类型是一个带有向上和向下箭头的数字框，允许我将任何整数放入，无论整数是否是有效的隐私级别（甚至是负值）。

我想看到的是一个下拉列表（选择）输入，我在模型中定义了三个枚举的字符串值。

解决方案

建立杰克的答案，这是对我有用的。说你的ActiveRecord模型是 Tweets ：

f.input：privacy_level，as：选择，收藏：Tweet.privacy_levels.keys

这里要注意的关键事项：

• 您的ActiveRecord有一个有用的字典（可用在enum_name.pluralize）枚举键值。


• 使用字符串（并忽略基础整数表示）更容易写入枚举值。

I've got a Rails 4.1 app in which I use an enum to represent the privacy level of an object.

In my schema:

t.integer "privacy_level", default: 0

In my model:

enum privacy_level: { privacy_private: 0, privacy_trusted: 1, privacy_public: 2 }

In my ActiveAdmin register file:

index do
  column :privacy_level
  default_actions
end

form do |f|
  f.inputs "Edit My Model" do
    f.input :privacy_level
  end
  f.actions
end

On the ActiveAdmin index page, it works great. The privacy level of each object shows up as "privacy_private", "privacy_trusted", and "privacy_public".

However, when I try to edit an object, the input type is a number box with up and down arrows which allow me to put any integer in, regardless of whether or not the integer is a valid privacy level (even negative values).

What I would like to see is a dropdown (select) input with the three enumerated string values I defined in my model.

解决方案

Building off of Jack's answer, here's what worked for me. Say your ActiveRecord model is Tweets:

f.input :privacy_level, as: :select, collection: Tweet.privacy_levels.keys

Key things to note here:

• your ActiveRecord has a useful dictionary (available at enum_name.pluralize) of enum keys to values.
• using strings (and ignoring the underlying integer representation) makes it easier to write to the enum value.

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