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我試圖將fields_for屬性添加到嵌套rails表單。任何時候,我嘗試創建一個新的對象,它返回預期Rails:無法獲取fields_for在嵌套資源內工作
消息(#58819400),得到了 陣列(#18903800)...
應用程序/控制器/ discussions_controller.rb:53:在 '創建」
如果我嘗試的基礎上,而不是非嵌套資源(又名‘的form_for @parent’從形式訪問嵌套的fields_for‘的form_for [@parent,@child]’它工作正常。下面的代碼 - 任何幫助真的很讚賞。
控制器:
# GET /discussions/new
# GET /discussions/new.xml
def new
@forum = Forum.find(params[:forum_id])
@discussion = Discussion.new
@discussion.messages.build
respond_to do |format|
format.html # new.html.erb
format.xml { render :xml => @discussion }
end
end
def create
@forum = Forum.find_by_id(params[:forum_id])
@discussion = @forum.discussions.new(params[:discussion])
@discussion.user = current_user
respond_to do |format|
if @discussion.save
format.html { redirect_to([@forum, @discussion], :notice => 'Discussion was successfu#ly created.') }
format.xml { render :xml => [@forum, @discussion], :status => :created, :location => @discussion }
else
format.html { render :action => "new" }
format.xml { render :xml => @discussion.errors, :status => :unprocessable_entity }
end
end
end
型號:
class Forum < ActiveRecord::Base
belongs_to :user
has_many :discussions, :dependent => :destroy
validates :title, :presence => true
accepts_nested_attributes_for :discussions, :allow_destroy => true
end
class Discussion < ActiveRecord::Base
belongs_to :user
belongs_to :forum
has_many :messages, :dependent => :destroy
validates :title, :presence => true
end
class Message < ActiveRecord::Base
belongs_to :user
validates :user, :presence => true
validates :content, :presence => true
end
的觀點:
<%= form_for [@forum, @discussion] do |f| %>
<% if @discussion.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@discussion.errors.count, "error") %> prohibited this discussion from being saved:</h2>
<ul>
<% @discussion.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :title %><br />
<%= f.text_field :title %>
</div>
<%= f.fields_for :messages do |builder| %>
<%= builder.label :content, "Message" %>
<%= builder.text_area :content, :rows => 10 %>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
最後,路由:
resources :forums do
resources :discussions do
resources :messages
end
end
任何幫助,非常讚賞 - 一世'米完全難倒了。