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Question

我有两个模型页面和作者，这里是模型页面的代码：

编辑-1

现在我的模型如下：

class Page < ActiveRecord::Base
validates :title, :presence => true

belongs_to :author


end

作者模型：

class Author < ActiveRecord::Base

has_many :pages
end

我的表格如下：

 <%= form_for(@page) do |f| %>
  <% if @page.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@page.errors.count, "error") %> prohibited this post from being saved:</h2>

      <ul>
      <% @page.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>
  <p>
    <%= f.label :title %><br />
    <%= f.text_field :title %>
  </p>
   <p>
    <%= f.label :body %><br />
    <%= f.text_area :body %>
  </p>
   <p>
   <%= f.fields_for :author do |fields| %>
         <%= f.label :author %><br />
         <%= fields.text_field :author %>
   <% end %>
   </p>
   <p>
    <%= f.label :email %><br />
    <%= f.text_field :email %>
  </p>
   <p>
    <%= f.label :reference %><br />
    <%= f.select(:reference,[['google',1],['yahoo',2],['MSN',3],['Ask',4]]) %>
  </p>
   <%= f.submit "Submit" %>
<% end %>

和控制器：

class PagesController < ApplicationController

  def index
    @total = Page.count
    @pages = Page.find(:all)
  end

  def show
    @page = Page.find(params[:id])
  end

  def new
    @page = Page.new


  end

  def create
    @page = Page.new(params[:page])
    if @page.save
        redirect_to pages_path, :notice => "The data has been saved!"
    else
        render "new"
    end
  end 

  def edit
    @page = Page.find(params[:id])


  end

  def update
    @page = Page.find(params[:id])

        if @page.update_attributes(params[:page])
            redirect_to pages_path, :notice => "Your post has been updated!"
        else
            render "edit"
        end 

  end 

  def destroy
    @page = Page.find(params[:id])
    @page.destroy
    redirect_to pages_path, :notice => "Your page has been deleted!"
  end
end

现在，当我提交表单时，它给了我这个错误：

ActiveRecord::AssociationTypeMismatch in PagesController#create

Author(#40328004) expected, got ActiveSupport::HashWithIndifferentAccess(#32291496)
Rails.root: C:/rorapp

Application Trace | Framework Trace | Full Trace
app/controllers/pages_controller.rb:19:in `new'
app/controllers/pages_controller.rb:19:in `create'
Request

Parameters:

{"utf8"=>"✓",
 "authenticity_token"=>"hzBlXsdUjEDDCLp036R8bJBwep6BdATSvJPNwt0M8Dg=",
 "page"=>{"title"=>"",
 "body"=>"",
 "author"=>{"author"=>""},
 "email"=>"",
 "reference"=>"1"},
 "commit"=>"Submit"}
Show session dump

Show env dump

Response

Headers:

None

如果我将accepts_nested_attributes_for :author添加到我的Page模型中，还有一个问题，那么该字段根本不显示。我真的想完成这个......任何帮助？

Answer 1

显然，这与关联无关。对不起，我很抱歉。您可以执行以下操作，但是您的页面控制器正在对作者执行操作，这不太合适。您可以创建一个作者控制器，并包括fields_for：pages，以便同时创建作者和第一页。

class PagesController < ApplicationController
  def new
    @author = Author.new
    @page = @author.pages.new
  end


  def create
    @author = Author.create(params[:author])
  end
end

class Author < ActiveRecord::Base
  has_many :pages
  accepts_nested_attributes_for :pages
end

class Page < ActiveRecord::Base
  belongs_to :author
end

<%= form_for(@author, :url => pages_url) do |f| %>
    <%= f.text_field :author %>
    <%= f.fields_for :pages do |fields| %>
        <%= fields.text_area :body %>
    <% end %>
<% end %>

rails 3中嵌套模型的部分形式

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1 个答案: