Question

我知道这是一个非常基本的解决方案，但我现在还没有看到它。我在CommentController #create中收到“找不到没有ID的帖子”错误。

我在帖子下面创建了一个“新评论”按钮，然后该按钮会重定向到评论表单。一旦用户输入他们的评论并点击“创建评论”按钮，评论就应该显示在原始帖子下面。先感谢您。

评论控制器

Class CommentsController < ApplicationController
  before_filter :authenticate_user!

  def new
  @comment = Comment.new
  end


  def create
    @post = Post.find(params[:post_id])
    @comment = @post.comments.create(params[:comment].permit(:commenter, :body))

    respond_to do |format|
      if @comment.save
        format.html { redirect_to @post, notice: 'Comment was successfully created.' }
        format.json { render json: @comment, status: :created, location: @comment }
      else
        format.html { render action: "new" }
        format.json { render json: @comment.errors, status: :unprocessable_entity }
      end
    end

  end

def destroy
    @post = Post.find(params[:post_id])
    @comment = @post.comments.find(params[:id])
    @comment.destroy
    redirect_to post_path(@post)
end

def show
  @comment = Comment.new
end

end

发表/显示

<div class="row">
    <div class="col-md-offset-4 col-med-8">
        <div class="panel panel-default">
        <div class="panel-heading center">

        <% if @post.image.url %>
            <%= image_tag @post.image.url(:medium) %>

        <% elsif @post.video.url %>
            <%= video_tag @post.video.url(:medium), controls: true, type: "video/mp4" %>
        <% end %></br>


        <p>
           <strong>Likes:</strong>
           <%= @post.get_likes.size%>
        </p>


        <%=link_to image_tag('like.jpg', :border => 0), likes_post_path(@post) %>    
        <%=link_to image_tag('unlike.jpg', :border => 0), dislikes_post_path(@post) %>


        </div>
        <div class="panel-body">
        <p><%= @post.description %></p>

        <% user = @post.user %>
        <p><strong><%= link_to(user.name, user_path(user)) if @post.user %></strong></p>

        <%= link_to 'New Comment', new_comment_path, class: "btn btn-danger btn-sm active" %></br>


        <br><% if @post.user == current_user %>
            <%= link_to edit_post_path(@post) do %>
            <span class="glyphicon glyphicon-edit"></span>
            Edit
          <% end %>
        <% end %>
        <%= link_to 'Back', posts_path %>

            </div>
        </div>
</div>

评论/ _form

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

      <ul>
      <% @comment.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>


  <div class="field">
    <%= f.label :body %><br>
    <%= f.text_area :body %>
  </div>
  <div class="actions">
    <%= f.submit class: "btn btn-danger btn-sm" %>
  </div>
<% end %>

路线

 resources :comments
 resources :posts do
    resources :comments
end

评论/显示

<p id="notice"><%= notice %></p>

<p>
  <strong>Post:</strong>
  <%= @comment.post_id %>
</p>

<p>
  <strong>Body:</strong>
  <%= @comment.body %>
</p>

<%= link_to 'Edit', edit_comment_path(@comment) %> |
<%= link_to 'Back', comments_path %>

Rake Routes

post_comments GET     /posts/:post_id/comments(.:format)          comments#index
                         POST    /posts/:post_id/comments(.:format)          comments#create
        new_post_comment GET     /posts/:post_id/comments/new(.:format)      comments#new
       edit_post_comment GET     /posts/:post_id/comments/:id/edit(.:format) comments#edit
            post_comment GET     /posts/:post_id/comments/:id(.:format)      comments#show

Answer 1

我建议进行以下更改：

<强>路线：

删除第一个resources :comments。保留以下内容：

resources :posts do
  resources :comments
end

帖子/显示视图

您应该使用new_post_comment_path代替new_comment_path。运行rake routes查看原因。

<强> CommentsController＃新

在@post操作中定义new：

def new
  @post = Post.find(params[:post_id])
  @comment = Comment.new
end

最后，在评论/ _form：

中

将<%= form_for [@post, Comment.new] do |f| %>更改为<%= form_for [@post, @comment] do |f| %>。虽然我相信<%= form_for @comment do |f| %>应该有用。

我建议您浏览Rails Guides以获取更多信息和解释。

Answer 2

我相信在评论控制器的def new中，您还需要设置@post，而不仅仅是@comment

无法找到没有ID / ActiveRecord :: RecordNotFound的帖子

2 个答案: