我使用Ruby on Rails创建了一个博客应用程序，并且刚刚添加了一个身份验证部分，它运行良好。我现在正在尝试返回我的应用程序来调整代码，使其仅显示与特定用户关联的信息。
目前，用户has_many :posts和Posts has_many :comments。
创建帖子后，我成功将user_id插入到post表中。此外，我成功只在登录/views/posts/index.html.erb视图时显示属于某个用户的帖子。我的问题在于评论。
例如，在主页上，当用户登录时，用户只会看到他们写过的帖子，但会看到所有帖子上所有用户的评论。这不是我想要的，需要一些方向来纠正。我只想显示写在所有登录用户帖子上的评论。
我是否需要创建关联，以便评论也属于用户？或者有没有办法调整我的代码，只需循环通过post来显示这些数据。
我已将下面的PostsController，CommentsController和/posts/index.html.erb的代码以及我的视图代码放入，但如果需要，会发布更多代码。
class PostsController < ApplicationController
before_filter :authenticate
auto_complete_for :tag, :tag_name
auto_complete_for :ugtag, :ugctag_name
def index
@tag_counts = Tag.count(:group => :tag_name,
:order => 'count_all DESC', :limit => 20)
conditions, joins = {}, :votes
@ugtag_counts = Ugtag.count(:group => :ugctag_name,
:order => 'count_all DESC', :limit => 20)
conditions, joins = {}, :votes
@vote_counts = Vote.count(:group => :post_title,
:order => 'count_all DESC', :limit => 20)
conditions, joins = {}, :votes
unless(params[:tag_name] || "").empty?
conditions = ["tags.tag_name = ? ", params[:tag_name]]
joins = [:tags, :votes]
end
@posts= current_user.posts.paginate(
:select => "posts.*, count(*) as vote_total",
:joins => joins,
:conditions=> conditions,
:group => "votes.post_id, posts.id ",
:order => "created_at DESC",
:page => params[:page], :per_page => 5)
@popular_posts=Post.paginate(
:select => "posts.*, count(*) as vote_total",
:joins => joins,
:conditions=> conditions,
:group => "votes.post_id, posts.id",
:order => "vote_total DESC",
:page => params[:page], :per_page => 3)
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => @posts }
format.json { render :json => @posts }
format.atom
end
end
def show
@post = Post.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => @post }
end
end
def new
@post = Post.new
respond_to do |format|
format.html # new.html.erb
format.xml { render :xml => @post }
end
end
def edit
@post = Post.find(params[:id])
end
def create
@post = current_user.posts.create(params[:post])
respond_to do |format|
if @post.save
flash[:notice] = 'Post was successfully created.'
format.html { redirect_to(@post) }
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
def update
@post = Post.find(params[:id])
respond_to do |format|
if @post.update_attributes(params[:post])
flash[:notice] = 'Post was successfully updated.'
format.html { redirect_to(@post) }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => @post.errors, :status => :unprocessable_entity }
end
end
end
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
CommentsController
class CommentsController < ApplicationController
before_filter :authenticate, :except => [:show, :create]
def index
@comments = Comment.find(:all, :include => :post, :order => "created_at DESC").paginate :page => params[:page], :per_page => 5
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => @comments }
format.json { render :json => @comments }
format.atom
end
end
def show
@comment = Comment.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => @comment }
end
end
# GET /posts/new
# GET /posts/new.xml
# GET /posts/1/edit
def edit
@comment = Comment.find(params[:id])
end
def update
@comment = Comment.find(params[:id])
respond_to do |format|
if @comment.update_attributes(params[:comment])
flash[:notice] = 'Comment was successfully updated.'
format.html { redirect_to(@comment) }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => @comment.errors, :status => :unprocessable_entity }
end
end
end
def create
@post = Post.find(params[:post_id])
@comment = @post.comments.build(params[:comment])
respond_to do |format|
if @comment.save
flash[:notice] = "Thanks for adding this comment"
format.html { redirect_to @post }
format.js
else
flash[:notice] = "Make sure you include your name and a valid email address"
format.html { redirect_to @post }
end
end
end
def destroy
@comment = Comment.find(params[:id])
@comment.destroy
respond_to do |format|
format.html { redirect_to Post.find(params[:post_id]) }
format.js
end
end
end
查看评论代码
<% Comment.find(:all, :order => 'created_at DESC', :limit => 3).each do |comment| -%>
<div id="side-bar-comments">
<p>
<div class="small"><%=h comment.name %> commented on:</div>
<div class="dark-grey"><%= link_to h(comment.post.title), comment.post %><br/></div>
<i><%=h truncate(comment.body, :length => 100) %></i><br/>
<div class="small"><i> <%= time_ago_in_words(comment.created_at) %> ago</i></div>
</p>
</div>
<% end -%>
答案 0 :(得分：1)
我相信你可以在user模型
has_many :comments, :through => :posts
然后是用户@user.comments。
答案 1 :(得分：1)
首先，不要搞乱MVC。行：
Comment.find(:all, :order => 'created_at DESC', :limit => 3)
应该在控制器中：
@comments = Comment.find(:all, :order => 'created_at DESC', :limit => 3)
并在视野中：
<% @comments.each do |comment| %>
甚至更好的偏见：
<%= render :partial => "comment_item", :collection => @comments %>
它会迭代所有@comments。
接下来，如果要显示分配给帖子的所有评论，那么关联帖子has_many评论就足够了。像这样使用它：
# controller
@posts = current_user.posts(:include => :comments)
# view
<% @posts.each do |post| %>
<%=h post.title %> - Comments: <br />
<% post.comments.each do |comment| %>
<%=h comment.body %>
<% end %>
<% end %>
如果您只想显示current_user发布的评论，那么您的所有评论都应填写user_id字段。并以与显示用户帖子相同的方式使用它。