为 HABTM 选择多个框 [英] Select many box for HABTM

问题描述

我有两个模型；问题和类别之间具有 HABTM 关联.现在我想要一个表格，我可以在其中编辑问题类别，但是我不知道如何.我从这个开始，但我迷路了，我不确定如何命名名称"属性等，以及如何使用问题自动编辑/创建它，我该如何设置?

I have two models; question and category which have a HABTM association between them. Now I want to have a form where I can edit the questions categories, however I don't know how. I started with this but I am lost, I am unsure on what to name the "name" attributes etc and how it is automatically edited/created with the question, how do I set this up?

<%= f.fields_for :categories do |categories_form| %>
        <%= categories_form.select "category_ids", Category.all.collect { |c| [c.description, c.id] }, {}, {:multiple => true, :size => 9} %>
    <% end %>

我设法设置了问题(has_many) --> 用fields_for 和accepts_nested_attributes_for 回答，但不是这个.

I managed to set up question(has_many) --> answer with fields_for and accepts_nested_attributes_for, but not this.

推荐答案

您应该看看以下 Ryan Bates 的截屏视频 嵌套模型表单第 1 部分 和 嵌套模型表单第 2 部分.

You should take a look at the following screencasts by Ryan Bates Nested Model Form Part 1 and Nested Model Form Part 2.

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