简单表单单选按钮 [英] Simple form radio button

问题描述

我正在使用 simple_form gem 并且非常喜欢它的简单性.但是，尝试设置一个简单的单选按钮超出了我的范围，因为我不断收到以下错误

i'm using the simple_form gem and really like its simplicity. However, trying to set to set up a simple radio button is beyond me as I keep getting the following error

未定义的局部变量或方法`vegan'"

1.这是我目前所拥有的

1.Here what I have so far

 <%= f.collection_radio_buttons :diettype, [[vegan, 'vegan'] ,[vegetarian, 'vegetarian']]%>

2.这里是我在 simple_form 之前使用的带有更新/补丁方法的代码，它将更新和保存用户需求

2.Heres the code I used before simple_form with an update/patch method, which would update and save a users requirement

 <%= f.label(:diettype, "Vegan") %>
 <%= f.radio_button(:diettype, "Vegan") %>
 <%= f.label(:diettype, "vegetarian") %>
 <%= f.radio_button(:diettype, "vegetarian")%>

3.这就是我想要重现的内容

3.And here is what I am trying to reproduce

<select>
   <option> vegan </option>
   <option> Vegetarian </option>
</select>

注意 - 素食主义者和素食主义者是选择选项，它们将存储在 :diettype 的数据库列中.

NOTE - vegan and vegetarian are select options that will be stored in the database column of :diettype.

推荐答案

在你的 controller action 中，添加这一行

In your controller action, add this line

  def actionname
    @types = ModelName.select(:diettype).distinct
    ..
  end

哪里，

actionname 是渲染视图的操作.

ModelName 是您的模型的名称，其中包含 diettype 字段.

ModelName is the name of your model which has diettype field in it.

在您的视图中，替换

<%= f.collection_radio_buttons :diettype, [[vegan, 'vegan'] ,[vegetarian, 'vegetarian']]%>

与

<%= f.collection_radio_buttons :diettype, @types, :diettype, :diettype %>

<%= f.collection_radio_buttons :diettype, @types, :diettype, :diettype %>

上一行的意思是:

创建一个单选按钮的集合，

Create a collection of radio buttons where,

1st :diettype : 当你选择一个单选按钮时会设置变量

1st :diettype : variable would be set when you select a radio button

@types : 这个集合被传递

2nd :diettype : 被选择的值

2nd :diettype : the value that is being selected

3rd :diettype : 按钮旁边的显示文本

3rd :diettype : the display text beside the button

EDIT2

正如您指定的那样，您需要一个 静态集合 并且您没有从数据库中获取任何值:

As you specified that you need a static collection and you are not taking any values from database :

只需在视图中添加以下行，无需更改控制器:

Simply add the following line in view, no need to change the controller :

<%= f.collection_radio_buttons :name, [['vegan', 'vegan'] ,['vegetarian', 'vegetarian']],:first, :last %> 

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