Ruby on rails 3 使用嵌套属性保存数据时出现问题
我是 我正在RubyonRails 3.0.7上构建一个网站,我想保存一个Ruby on rails 3 使用嵌套属性保存数据时出现问题,ruby-on-rails-3,nested-attributes,Ruby On Rails 3,Nested Attributes,我是 我正在RubyonRails 3.0.7上构建一个网站,我想保存一个存储对象及其语言。因此,我有以下模型: class Store < ActiveRecord::Base belongs_to :user has_many :languages, :through => :store_languages has_many :store_languages accepts_nested_attributes_for :store_languages #V
存储
对象及其语言
。因此,我有以下模型:
class Store < ActiveRecord::Base
belongs_to :user
has_many :languages, :through => :store_languages
has_many :store_languages
accepts_nested_attributes_for :store_languages
#Validations
validates :title, :presence => true, :length => 5..100
validates :contact_email, :presence => true, :format => { :with => /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i }
end
class Language < ActiveRecord::Base
has_many :stores, :through => :store_languages
has_many :store_languages
end
class StoreLanguage < ActiveRecord::Base
belongs_to :store
belongs_to :language
validates :store_id, :presence => true
validates :language_id, :presence => true
end
视图:/stores/new.html.erb:
<%= form_for(@store) do |f| %>
<% if @store.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@store.errors.count, "error") %> prohibited this store from being saved:</h2>
<ul>
<% @store.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<p>
<label for="title">Title*</label><br />
<%= f.text_field :title %>
</p>
<p>
<label for="description">Description</label><br />
<%= f.text_field :description %>
</p>
<p>
<label for="contact_email">Contact E-mail*</label><br />
<%= f.text_field :contact_email %>
</p>
<p>
<label for="logo">Logo</label><br />
<%= f.file_field :logo %>
</p>
<% f.fields_for :store_languages do |lf| %>
<%= lf.collection_select :language_id, @languages, :id, :name, {}, {:multiple => true } %>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
当我从列表中选择两种语言创建一个新的存储时,它将在store\u languages
表中保存以下内容:
id | name
3 English
4 Español
id |商店id |语言id
4 4 1
而且语言_id=1不存在
如果我在create
操作中调试应用程序,我会得到以下结果:
"store"=>{"title"=>"asdasdsdsadasdasdasd", "description"=>"", "contact_email"=>"asdasdsa@asdasdsad.com", "logo"=>"", "store_languages_attributes"=>{"0"=>{"language_id"=>["3", "4"]}}}
您可以在这里看到ID是正确的:3和4。所以,我不知道为什么它可以节省1
有什么想法吗?试试看
<%= lf.collection_select :language_ids, @languages, :id, :name, {}, {:multiple => true } %>
true}%>
(即在属性名称中使用
ids
而不是id
)我在尝试该操作时遇到以下错误:未定义的方法'language\u ids'#
<%= lf.collection_select :language_ids, @languages, :id, :name, {}, {:multiple => true } %>