如果我有一个模型......访问使用mongoid /的MongoDB /导轨
class Post
include Mongoid::Document
field :link
field :title
field :synopsis
field :added_on, :type => Date
validates_presence_of :link
embeds_many :replies
references_one :topic
end
和
class Topic
include Mongoid::Document
field :category
referenced_in :post
end
什么会我需要在index.html.erb的代码访问的基准场主题中的数据或添加要发布的主题。
我试过post.topic但我得到一个未定义的方法错误。
非常感谢。
编辑:
下面是index.html的代码
<div id="post">
<% @posts.each do |post| %>
<div class="title_container">
<%= link_to post.title, post.link %> || <%= link_to 'Edit', edit_post_path(post) %> || <%= post.topic %>
</div>
<% end %>
<br />
<h2>Topics<h2>
<% for topic in @post.topics %>
<h3><%= topic.category %></h3>
<% end %>
</div>
这里是posts_controller
class PostsController < ApplicationController
# GET /posts
# GET /posts.xml
def index
@posts = Post.all
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => @posts }
end
end
# GET /posts/1
# GET /posts/1.xml
def show
@post = Post.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => @post }
end
end
# GET /posts/new
# GET /posts/new.xml
def new
@post = Post.new
respond_to do |format|
format.html # new.html.erb
format.xml { render :xml => @post }
end
end
# GET /posts/1/edit
def edit
@post = Post.find(params[:id])
end
# POST /posts
# POST /posts.xml
def create
@post = Post.new(params[:post])
respond_to do |format|
if @post.save
format.html { redirect_to(@post, :notice => 'Post was successfully created.') }
format.xml { render :xml => @post, :status => :created, :location => @post }
else
format.html { render :action => "new" }
format.xml { render :xml => @post.errors, :status => :unprocessable_entity }
end
end
end
# PUT /posts/1
# PUT /posts/1.xml
def update
@post = Post.find(params[:id])
respond_to do |format|
if @post.update_attributes(params[:post])
format.html { redirect_to(@post, :notice => 'Post was successfully updated.') }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => @post.errors, :status => :unprocessable_entity }
end
end
end
# DELETE /posts/1
# DELETE /posts/1.xml
def destroy
@post = Post.find(params[:id])
@post.destroy
respond_to do |format|
format.html { redirect_to(posts_url) }
format.xml { head :ok }
end
end
end
编辑:
我也加入相关_form.html .erb代码。
<div class="field">
<%= f.label :topic_id %>
<%= f.collection_select :topic, Post.topic, :id, :category, :prompt => "Select a Topic" %>
</div>
编辑:
更新到2.0.0.rc.7仍不能得到它。
为了好玩,尝试了railscast视频中的关键方法(http://railscasts.com/episodes/238-mongoid)。我在“PostsController#update”中得到“BSON :: InvalidObjectId”错误。
@ user593120,我们可以更好地帮助你,如果你发布index.html.erb位指示和方法的相关部分。 – hade 2011-01-29 11:33:13
@ user593120你也可以发布控制器代码吗? – Dogbert 2011-01-29 11:35:14
@hade @Dogbert我已更新原始帖子。这是有用的信息吗? – moctopus 2011-01-29 14:37:08