如何确保主页中显示的帖子供稿中的每个帖子的所有注释都显示在其下？ [英] How do I make sure each post in the Post feed shown in the home page has all its comments displayed under it?
本文介绍了如何确保主页中显示的帖子供稿中的每个帖子的所有注释都显示在其下？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
当我尝试显示家庭和用户视图中显示的每个帖子下的评论。如何在家庭和用户视图中列出与帖子下的每个帖子关联的评论？
如何确保数据库中的评论列在相应的发布？
这是我的评论控制器：
class CommentsController< ApplicationController
def index
@comments = Comment.all.paginate（page：params [：page]）
end
def show
@comment = Comment.find（ params [：id]）
@post = @ Comment.post
end
def new
end
def create
@comment = Comment.new
if @ comment.save
flash [：success] =创建的注释
redirect_to：back
else
渲染'new'
end
end
def edit
@comment = Comment.find（params [：id]）
end
def update
@comment = comment.find（ params [：id]）
if @ comment.update_attributes（comment_params）
flash [：success] =评论更新
redirect_to @ comment.post
else
渲染'编辑'
结束
结束
def破坏
Comment.find（params [：id]）。destroy
flash [：success] =Comment deleted
redirect_to users_url
end
private
def comment_params
params.require（：comment）.permit（：author_姓名，：身体）
结束
结束
这是我的主页视图： app / views / home / home.html.erb：
<％如果被记录下来？ ％GT;
< div class =row>
< aside class =col-md-4>
< section class =user_info>
<％=呈现'shared / user_info'％>
< / section>
< hr />
< br />
< section class =stats>
<％= render'shared / stats'％>
< / section>
< section class =post_form>
<％=呈现'shared / post_form'％>
< / section>
< / aside>
< div class =col-md-8>
< h3>后期提要< / h3>
<％=呈现'shared / feed'％>
< / div>
< / div>
<％else％>
< div class =center jumbotron>
< h1>欢迎来到Unstarv网站< / h1>
< h2>
请立即注册以使用此网站
<％= link_to注册，signup_path =％>
现在。
< / h2>
<％= link_toSign up now！，signup_path，class：btn btn-lg btn-primary％>
< / div>
<％= link_to image_tag（rails.png，alt：unstarv logo），'＃'％>
<％end％>
以下是我的家用控制器：
class HomeController< ApplicationController
def home
如果logged_in？
@post = current_user.posts.build
@feed_items = current_user.feed.paginate（page：params [：page]）
end
end
def about
end
def privacy
end
def terms
end
end
这里是我的Post模型，相关部分：
pre > class Post< ActiveRecord :: Base
belongs_to：user
has_many：comments
default_scope - > {order（created_at：desc）}
mount_uploader：picture，PictureUploader
end
<我的用户模型的相关部分：
class User< ActiveRecord :: Base
attr_accessor：remember_token
before_save {self.email = email.downcase}
has_many：posts，dependent：：destroy
has_many：comments $ b $ has_many： active_relationships，class_name：Relationship，
foreign_key：follower_id，
dependent：：destroy
has_many：passive_relationships，class_name：Relationship，
foreign_key：followed_id，
依赖：：destroy
has_many：跟随，通过：：active_relationships，source：：跟随
has_many：followers，通过:: passive_relationships，source :: follower
validates：username， presence：true，length：{maximum：50}
VALID_EMAIL_REGEX = /\A[\w+\-.]+@[az\d\-.]+\.[az]+ \ z / i
验证：email，presence：true，格式：{with：VALID_EMAIL_REGEX}，
唯一性：{case_sensitive：false}
has_secure_password
validates：password，length ：{minimum：6}，allow_blank：true
def feed
following_ids =SELECT followed_id FROM relationship WHERE follower_id =：user_id
Post.where（user_id IN（＃{following_ids}）or user_id =：user_id， user_id：id）
end
end
这里是我的评论模式：
class评论< ActiveRecord :: Base
belongs_to：post
belongs_to：user
default_scope - > {order（created_at：：desc）}
end
这里是后控制器：
class PostsController< ApplicationController
before_action：logged_in_user，只有：[：create，：destroy]
def index
@posts = Post.all
end
def show
@ post = Post.find（params [：id]）
@comment = Comment.new
@ comment.post_id = @ post.id
@comments = @ post.comments.all
end
def new
@post = Post.new
end
def create
@post = current_user.posts.build（post_params）
if @ post.save
flash [：success] =创建后！
redirect_to root_url
else
@feed_items = []
render'home / home'
end
end
def edit
@post = Post.find（params [：id]）
end
def update
@post = Post.find（params [：id]）
@ post.update post_params）
flash.notice =发布#{@post.title}'已更新！
render'home / home'
end
def update
@post = Post.find（params [：id]）
@ post.update （post_params）
flash.notice =发布#{@post.title}'已更新！
redirect_to root_url
结束
私有
＃使用回调共享设置或操作之间的约束。
def set_post
@post = Post.find（params [：id]）
end
＃不要信任吓人的互联网参数，只允许白名单通过。
def post_params
params.require（：post）.permit（：title，：body，：picture）
end
end
这是我的app / views / post / _post.html.erb文件，
< li id =post-<％= post.id％>>
< span class =user><％= link_to post.user.username，post.user％>< / span>
< span class =content>
<％= post.title％>
<％= post.body％>
<％= image_tag post.picture.url if post.picture？ ％GT;
< / span>
< span class =timestamp>
已发布<％= time_ago_in_words（post.created_at）％>前。
<％if current_user？（post.user）％>
<％= link_todelete，post，method :: delete，
data：{confirm：你确定？ }％>
<％end％>
< / span>
< section>
< h2>您的评论在这里< / h2>
< h3>发表评论< / h3>
< h3>发表评论< / h3>
<％=呈现'shared / comment_form'％>
<％post.comments.all.each do | comment | ％GT;
< h4>< small>评论< / small> <％= comment.post.user.username％>< / h4>
< p class =comment><％= comment.body％>< / p>
< p>< small>发布<％= distance_of_time_in_words（Time.now，comment.created_at）％>前及LT; /小>< / p为H.
< br />
<％end％>
< / li>
这里是我的app / views / shared / comment_form_html.erb，它工作正常：
<％= form_for [post，post.comments.build] do | f | ％GT;
< p>
<％= f.label：body，Your Comment％>< br />
<％= f.text_area：body％>
< / p>
< p>
<％= f.submit'提交'。 method =post，class：'btn btn-primary'％>
< / p>
<％end％>
这是我的app / views / posts / _post.html.erb
< li id =post-<％= post.id％>>
< span class =user><％= link_to post.user.username，post.user％>< / span>
< span class =content>
<％= post.title％>
<％= post.body％>
<％= image_tag post.picture.url if post.picture？ ％GT;
< / span>
< span class =timestamp>
已发布<％= time_ago_in_words（post.created_at）％>前。
<％if current_user？（post.user）％>
<％= link_todelete，post，method :: delete，
data：{confirm：你确定？ }％>
<％end％>
< / span>
< h2>评论< / h2>
< h3>发表评论< / h3>
<％=渲染'shared / comment_form'，post：post％>
< h3>评论（<％= post.comments.size％>）< / h3>
<％post.comments.each do | comment | ％GT;
< h4>< small>评论< / small> <％= comment.post.user.username％>< / h4>
< p class =comment><％= comment.body％>< / p>
< p>发布<％= distance_of_time_in_words（Time.now，comment.created_at）％>前及LT; / p为H.
< / li>
< br />
<％end％>
非常感谢您的帮助!!!!
解决方案
这个问题与您如何创建注释有关。
使用实际的代码，注释不会属于任何职位，所以在您的 comments_controller 更改创建行动到类似：
def create
post = Post.find（params [：post_id]）
@comment = post.comments.build（comment_params）
if @ comment.save
flash [：success] =创建的评论
redirect_to：back
else
render'new'
end
结束
I have a Post model, and a Comment model that belongs to Post. I was able to display the Post in the home view corresponding to the home controller and home action and the User/show view. Thus, in the home and user views, the posts are listed in order of creation time. I was also able to have a post form in both the user and home views and a comment form in the home and user views.
The problem arises when I try to display the comment underneath each displayed Post in the home and user views. How can I list the comments associate with each post under the post in the home and user views ?
How do I make sure the comments in the databased are listed under the corresponding post ?
Here is my comments controller:
class CommentsController < ApplicationController
def index
@comments =Comment.all.paginate(page: params[:page])
end
def show
@comment = Comment.find(params[:id])
@post = @Comment.post
end
def new
end
def create
@comment = Comment.new(comment_params)
if @comment.save
flash[:success] = "Comment created"
redirect_to :back
else
render 'new'
end
end
def edit
@comment = Comment.find(params[:id])
end
def update
@comment = comment.find(params[:id])
if @comment.update_attributes(comment_params)
flash[:success] = "Comment updated"
redirect_to @comment.post
else
render 'edit'
end
end
def destroy
Comment.find(params[:id]).destroy
flash[:success] = "Comment deleted"
redirect_to users_url
end
private
def comment_params
params.require(:comment).permit(:author_name, :body)
end
end
Here is my home view: app/views/home/home.html.erb:
<% if logged_in? %>
<div class="row">
<aside class="col-md-4">
<section class="user_info">
<%= render 'shared/user_info' %>
</section>
<hr/>
<br/>
<section class="stats">
<%= render 'shared/stats' %>
</section>
<section class="post_form">
<%= render 'shared/post_form' %>
</section>
</aside>
<div class="col-md-8">
<h3>Post Feed</h3>
<%= render 'shared/feed' %>
</div>
</div>
<% else %>
<div class="center jumbotron">
<h1>Welcome to the Unstarv website</h1>
<h2>
Please sign up now to use this site
<%= link_to "Sign Up", signup_path =%>
now.
</h2>
<%= link_to "Sign up now!", signup_path, class: "btn btn-lg btn-primary" %>
</div>
<%= link_to image_tag("rails.png", alt: "unstarv logo"), '#' %>
<% end %>
And here is my home controller:
class HomeController < ApplicationController
def home
if logged_in?
@post = current_user.posts.build
@feed_items = current_user.feed.paginate(page: params[:page])
end
end
def about
end
def privacy
end
def terms
end
end
And here is my Post model, the relevant part:
class Post < ActiveRecord::Base
belongs_to :user
has_many :comments
default_scope -> { order(created_at: :desc) }
mount_uploader :picture, PictureUploader
end
The relevant part of my User model:
class User < ActiveRecord::Base
attr_accessor :remember_token
before_save { self.email = email.downcase }
has_many :posts, dependent: :destroy
has_many :comments
has_many :active_relationships, class_name: "Relationship",
foreign_key: "follower_id",
dependent: :destroy
has_many :passive_relationships, class_name: "Relationship",
foreign_key: "followed_id",
dependent: :destroy
has_many :following, through: :active_relationships, source: :followed
has_many :followers, through: :passive_relationships, source: :follower
validates :username, presence: true, length: { maximum: 50 }
VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
validates :email, presence: true, format: { with: VALID_EMAIL_REGEX },
uniqueness: { case_sensitive: false }
has_secure_password
validates :password, length: { minimum: 6 }, allow_blank: true
def feed
following_ids = "SELECT followed_id FROM relationships WHERE follower_id = :user_id"
Post.where("user_id IN (#{following_ids}) OR user_id = :user_id", user_id: id)
end
end
And here is my Comment model:
class Comment < ActiveRecord::Base
belongs_to :post
belongs_to :user
default_scope -> { order(created_at: :desc) }
end
And here is the post controller:
class PostsController < ApplicationController
before_action :logged_in_user, only: [:create, :destroy]
def index
@posts = Post.all
end
def show
@post = Post.find(params[:id])
@comment = Comment.new
@comment.post_id = @post.id
@comments = @post.comments.all
end
def new
@post = Post.new
end
def create
@post = current_user.posts.build(post_params)
if @post.save
flash[:success] = "Post created!"
redirect_to root_url
else
@feed_items = []
render 'home/home'
end
end
def edit
@post = Post.find(params[:id])
end
def update
@post = Post.find(params[:id])
@post.update(post_params)
flash.notice = "Post '#{@post.title}' Updated!"
render 'home/home '
end
def update
@post = Post.find(params[:id])
@post.update(post_params)
flash.notice = "Post '#{@post.title}' Updated!"
redirect_to root_url
end
private
# Use callbacks to share common setup or constraints between actions.
def set_post
@post = Post.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def post_params
params.require(:post).permit(:title, :body, :picture)
end
end
Here is my app/views/post/_post.html.erb file,
<li id="post-<%= post.id %>">
<span class="user"><%= link_to post.user.username, post.user %></span>
<span class="content">
<%= post.title %>
<%= post.body %>
<%= image_tag post.picture.url if post.picture? %>
</span>
<span class="timestamp">
Posted <%= time_ago_in_words(post.created_at) %> ago.
<% if current_user?(post.user) %>
<%= link_to "delete", post, method: :delete,
data: { confirm: "You sure?" } %>
<% end %>
</span>
<section>
<h2>Your Comments here</h2>
<h3>Post a Comment</h3>
<h3>Post a Comment</h3>
<%= render 'shared/comment_form' %>
<% post.comments.all.each do |comment| %>
<h4><small>Comment by</small> <%= comment.post.user.username %></h4>
<p class="comment"><%= comment.body %></p>
<p><small>Posted <%= distance_of_time_in_words(Time.now, comment.created_at) %> ago</small></p>
<br/>
<%end%>
</li>
And here is my app/views/shared/comment_form_html.erb , which works fine:
<%= form_for [ post, post.comments.build] do |f| %>
<p>
<%= f.label :body, "Your Comment" %><br/>
<%= f.text_area :body %>
</p>
<p>
<%= f.submit 'Submit' . method="post", class: 'btn btn-primary' %>
</p>
<% end %>
Here is my app/views/posts/_post.html.erb
<li id="post-<%= post.id %>">
<span class="user"><%= link_to post.user.username, post.user %></span>
<span class="content">
<%= post.title %>
<%= post.body %>
<%= image_tag post.picture.url if post.picture? %>
</span>
<span class="timestamp">
Posted <%= time_ago_in_words(post.created_at) %> ago.
<% if current_user?(post.user) %>
<%= link_to "delete", post, method: :delete,
data: { confirm: "You sure?" } %>
<% end %>
</span>
<h2>Comments</h2>
<h3>Post a Comment</h3>
<%= render 'shared/comment_form', post: post %>
<h3>Comments (<%= post.comments.size %>)</h3>
<% post.comments.each do |comment| %>
<h4><small>Comment by</small> <%= comment.post.user.username %></h4>
<p class="comment"><%= comment.body %></p>
<p>Posted <%= distance_of_time_in_words(Time.now, comment.created_at) %> ago</p>
</li>
<br/>
<%end%>
Thanks a lot for your help !!!!
解决方案
The issue is related in how you are creating the comments.
With the actual code, the comment does not belong to any post so in your comments_controller change create action to something like:
def create
post = Post.find(params[:post_id])
@comment = post.comments.build(comment_params)
if @comment.save
flash[:success] = "Comment created"
redirect_to :back
else
render 'new'
end
end
这篇关于如何确保主页中显示的帖子供稿中的每个帖子的所有注释都显示在其下？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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