Question

我试图在rails中为我的评论实施回复。我正在观看此视频作为指南http://railscasts.com/episodes/262-trees-with-ancestry 我创建的所有注释都成为根节点，每次我尝试回复注释时，它似乎都没有注册为子节点。（我已经使用rails控制台进行了检查，并且回复评论的栏目＆＃39; ancestry＆＃39;总是为零）

我的评论是Post Model下的嵌套资源。我怀疑问题出在评论控制器中的create函数？

使用rails＆＃39; 4.2.4＆＃39;

评论控制员：

def new
    @post = Post.find(params[:post_id]) 
    @comment = @post.comments.build
    @comment.parent_id = params[:parent_id]

end

def create

    @post = Post.find(params[:post_id])
    @comment = @post.comments.create(comment_params)
    @comment.user = current_user

    if @comment.save
        redirect_to build_post_path(@post)
    else
        redirect_to build_post_path(@post)
    end
end

评论/ new.html.erb

    <div class = "row">
        <div class="col-md-8 col-md-offset-2 ">
            <h3>Reply</h3>
            <ol class ="comments">
                <%= render @comment.parent if @comment.parent %>
            </ol>
        </div>
    </div>


    <%= render 'form' %>

评论/ _form.html.erb

<div class = "row">
      <div class = "col-md-5 col-md-offset-2">
            <%= form_for([@post, Comment.new]) do |f| %>

                  <%= render 'shared/error_messages',object: f.object %>

                  <%= f.hidden_field :parent_id %>

                  <%= f.label :comment %>
                  <%= f.text_area :comment , class: 'form-control', rows: "4"  %>

                  <div class = "row">
                        <div class = "col-md-3">
                              <%= f.submit "Submit", class: "btn btn-primary" %>
                        </div>
                  </div>
            <% end %>
      </div>
</div>

评论/ _comments.html.erb

<li id="comment-<%= comment.id %>">

  <span class="avatar"><%= image_tag(comment.user.avatar.url(:thumb)) %></span>
  <span class="user"><%= link_to comment.user.name, comment.user %> <span class = "timestamp"><%= time_ago_in_words(comment.created_at) %> ago.</span></span>
  <span class="content"><%= comment.comment %></span>
  <span class="options">

    <%= link_to "Index", post_comments_path %> | 

    <%= link_to "Reply", new_post_comment_path(:parent_id => comment) %> |

    <% if current_user?(comment.user) %>
      <%= link_to "Delete", [comment.post, comment], method: :delete,
                                       data: { confirm: "You sure?" } %>
      <%= link_to "Edit", edit_post_comment_path(comment.post, comment) %>
    <% end %>
  </span>

</li>

交/ show.html.erb

<div class = "row">
    <div class="col-md-8 col-md-offset-2 ">
        <h3>Comments (<%= @post.comments.count %>)</h3>
        <ol class ="comments">
            <%= nested_messages @post.comments.arrange(:order => :created_at) %>
        </ol>
    </div>
</div>

帮助方法

def nested_messages(messages)
    messages.map do |message, sub_messages|
      render(message) + content_tag(:div, nested_messages(sub_messages), :class => "nested_messages")
    end.join.html_safe
  end

Answer 1

您在表单声明中调用了Comment.new，尽管您已在新方法中发起了新注释，将表单调用更改为：

<%= form_for([@post, @comment]) do |f| %>

我认为通过添加，您不必手动设置parent_comment的值。

无法获得嵌套注释以使用祖先gem

1 个答案: