Ruby-on-rails Rails form_for 和 collection_select
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/6191352/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Rails form_for with collection_select
提问by Rymo4
I'm trying to create a field that creates an instance of the Ranking class. It has a comment field already which sets the params[:ranking][:comment]but now I want to add a drop down that displays something like:
我正在尝试创建一个字段来创建 Ranking 类的实例。它已经有一个注释字段，用于设置params[:ranking][:comment]但现在我想添加一个下拉菜单，显示如下内容：
1: horrible, 2: poor, 3: mediocre, 4: good, 5: great
1：可怕，2：差，3：一般，4：好，5：很棒
I would like these to set the params[:ranking][:score] to a value 1-5 so that in my create method I can do something like this:
我希望这些将 params[:ranking][:score] 设置为值 1-5，以便在我的 create 方法中我可以执行以下操作：
@ranking = Ranking.new( #....
:score => params[:ranking][:score])
My form looks like this right now:
我的表格现在看起来像这样：
<%= form_for([@essay, @ranking]) do |f| %>
<%= render 'shared/error_messages', :object => f.object %>
<div classs="field">
<%= f.text_area :comment %>
</div>
<div classs="field">
<%= #something here!%>
</div>
<div class="actions">
<%= f.submit "Submit" %>
</div>
<% end %>
I know that I need to use the collection_selectbut I haven't been able to get it working.
我知道我需要使用 ，collection_select但我一直无法让它工作。
回答by Aaron Hinni
You should just be able to use the regular selecthelper for something like that:
您应该能够将常规select助手用于类似的事情：
f.select :score, [['horrible', 1], ['poor', 2], ['mediocre', 3], ['good', 4], ['great', 5]]
You would use collection_selectif you had a model for the scores. Something like:
collection_select如果您有分数模型，您将使用。就像是：
f.collection_select :score_id, Score.all, :id, :name
See the API docs for collection_select
请参阅collection_select的 API 文档
