无法在我的视图中显示回复

Question

所以我正在建立一个论坛，除了查看回复外，一切似乎都正常。当我去访问该页面时，它说该方法未定义。由于我的回复是关于我的讨论显示操作，我知道以下行是问题所在：

@posts = @discussion.posts

在我看来，我使用了@posts.reply 但失败了。我已经检查了控制台，并且 user_id 和 discussion_id 通过帖子是正确的，所以我不确定出了什么问题。如前所述，我认为我用上面的代码错误地调用了帖子？如果没有，那么请让我知道您希望看到什么代码（如果有），我可以为您安排。

谢谢！

乔

#Post Model (Replies)

class Post < ActiveRecord::Base
    belongs_to :discussion
    belongs_to :user
end

#Discussion Model (Thread)

class Discussion < ActiveRecord::Base
    belongs_to :user
    has_many :posts
    extend FriendlyId
  friendly_id :subject, use: :slugged
end

#User Model

class User < ActiveRecord::Base

    has_many :articles
    has_many :discussions
    has_many :posts, :through => :discussions
    ...

#Discussions Controller to SHOW Posts

class DiscussionsController < ApplicationController

...
    def show
    @discussion = Discussion.friendly.find(params[:id])
    @users = User.all.order("created_at DESC")
    @posts = @discussion.posts
    render :layout => 'discussion'
  end
...
end

#Posts Controller

class PostsController < ApplicationController

  before_action :authenticate_user!
  before_action :set_discussion, only: [:new, :create, :destroy]

  def new
    @post = @discussion.post.new
  end

  def create
    # new does not insert the record into the database
    @post = @discussion.posts.build(create_params)
    @post.user = current_user  
    if @post.save
      redirect_to @discussion, notice: "It has been posted!" 
    else
      render :new # or redirect back
    end
  end

  def destroy
    @post = @discussion.posts.find(params[:id]).destroy
    flash.notice = "Deleted"
    redirect_to discussion_path(@discussion)
  end

  private    

  def create_params
    # Only permit the params which the user should actually send!
    params.require(:post).permit(:reply) 
  end

  # Will raise an ActiveRecord::NotFoundError
  # if the Discussion does not exist
  def set_discussion
    @discussion = Discussion.friendly.find(params[:discussion_id])
  end
end

#View for showing Replies

<%= @posts.reply %>
Posted: <%= @posts.created_at.strftime("%b. %d %Y") %></p>
<p><%= link_to "Delete Comment", [@posts.discussion], data: {confirm: "Are you sure you wish to delete?"}, method: :delete %></p>

#View for Reply Form

<h2>Reply</h2>
<%= form_for [ @discussion, @posts ] do |f| %>
  <p>
    <%= f.label :reply, "Reply" %><br/>
    <%= f.text_field :reply %>
  </p>
    <p>
    <%= f.submit 'Submit' %>
  </p>
<% end %>

错误：

undefined method `to_key' for #<ActiveRecord::Associations::CollectionProxy []> 
(Highlighting the post form)

undefined local variable or method `posts' for #<#<Class:0x007fa71bd31228>:0x007fa721e5f018>
(Highlighting `<%= posts.reply %>`)

Answer 1

这段代码：

<%= @posts.reply %>
Posted: <%= @posts.created_at.strftime("%b. %d %Y") %></p>
<p><%= link_to "Delete Comment", [@posts.discussion], data: {confirm: "Are you sure you wish to delete?"}, method: :delete %></p>

应该是这样的：

<% @posts.each do |post| %>
    Posted: <%= post.created_at.strftime("%b. %d %Y") %></p>
    <p><%= link_to "Delete Comment", [post.discussion], data: {confirm: "Are you sure you wish to delete?"}, method: :delete %></p>
<% end %>

但您的代码中似乎存在更多错误，您需要修复这些错误。

希望这会有所帮助。