在另一个模型的创建视图中设置一个模型的属性

Question

我有一个has_one配置文件的用户模型,该配置文件属于该用户.该配置文件有一个type用于单表继承的列,可以是"artist"或"listener".我希望用户在新用户视图中注册时设置此项.因此我有以下形式的代码:

<%= f.fields_for :profile do |t| %>
 <div class ="field">
    <%= t.label :type, "Are you an artist or listener?" %><br />
    <%= t.radio_button :type "artist" %>
    <%= t.radio_button :type "listener" %>
  </div>
<% end %>   

这在我的用户模型中:

accepts_nested_attributes_for :profile

但我得到他的错误:

ArgumentError in Videos#index

Showing /rubyprograms/dreamstill/app/views/videos/_video.html.erb where line #3 raised:

No association found for name `profile'. Has it been defined yet?

为什么会这样,我该如何解决？

另外我很困惑为什么错误会在我的视频部分中引出第3行,这根本就没有提到profile......

更新:

这是整个表格:

<%= form_for(@user) do |f| %>
  <% if @user.errors.any? %>
  <div id="errorExplanation">
    <h2><%= pluralize(@user.errors.count, "error") %> prohibited this user from being saved:</h2>
    <ul>
    <% @user.errors.full_messages.each do |msg| %>
      <li><%= msg %></li>
    <% end %>
    </ul>
  </div>
  <% end %>

  <div class="field">
    <%= f.label :email %><br />
    <%= f.text_field :email %>
  </div>
  <div class="field">
    <%= f.label :password %><br />
    <%= f.password_field :password %>
  </div>
  <div class="field">
    <%= f.label :password_confirmation, "Password Confirmation" %><br />
    <%= f.password_field :password_confirmation %>
  </div>
  <%= f.fields_for :profile do |t| %>
    <div class ="field">
      <%= t.label :type, "Are you an artist or listener?" %><br />
      <%= t.radio_button :type "artist" %>
      <%= t.radio_button :type "listener" %>
    </div>
  <% end %>     
  <div class="field">
    <%= f.label :name, "Full Name" %><br />
    <%= f.text_field :name %>
  </div>
  <div class="action">
    <%= f.submit %>
  </div>
<% end %>

这些是与用户模型中的配置文件相关的三行:

accepts_nested_attributes_for :profile
before_create :build_profile 
has_one :profile  

Answer 1

你应该编辑你的模型,并按正确的顺序设置所有这些东西:

has_one :profile  # it should be first
accepts_nested_attributes_for :profile
before_create :build_profile