javascript - 使用 Ajax 删除嵌套注释

Question

我在使用 Ajax 删除评论时遇到一些问题。我想我已经很接近了，但不确定，需要一些建议。还在习惯jquery之类的。我可以通过 ajax 删除评论，但实际上不会删除记录本身，所以可能是一个简单的语法问题。

销毁.js.erb

$('#remove_comment').remove();

我想我需要用评论 ID 来标记它，但我遇到了问题，因为评论嵌套在 Pit 模型下。

_comment.html.erb

<div class = "well", id = "remove_comment">
    <p>
      <%= comment.body %>
    <p>posted by: <%= comment.user.name %></p>
    <div class = "response">
       <p class = "like-response">Was this response persuading to you?</p>
       <%= link_to "Yes", pit_comment_like_path(@pit, comment), method: :put %>
       <%= link_to "No", pit_comment_dislike_path(@pit, comment), method: :put %>
    </div>

    <div class = "response-convince">
      <p class = "dislike-comment">
        <%= comment.get_dislikes.size %> users found this response unpersuasive
      </p>
       <p class = "like-comment">
        <%= comment.get_likes.size %> users found this response persuasive</p>
      </p>
    </div>
    <p>


    <%if comment.user == current_user %>

     <%= link_to 'Destroy Comment', [@pit, comment],
                 method: :delete,
                 data: { confirm: 'Are you sure?' }, remote: true, class: "btn btn-default" %>
    </p>
  <% end %>  
</div>

评论 Controller

def destroy
  @pit = Pit.find(params[:pit_id])
  @comment = @pit.comments.find(params[:id])
  @comment.destroy
    respond_to do |format|
        format.html {redirect_to pit_path(@pit)}
        format.js {}
    end

日志似乎工作正常

Started DELETE "/pits/398/comments/63" for 127.0.0.1 at 2014-09-11 12:31:08 -0500
Processing by CommentsController#destroy as JS
  Parameters: {"pit_id"=>"398", "id"=>"63"}
  Pit Load (0.1ms)  SELECT  "pits".* FROM "pits"  WHERE "pits"."id" = ? LIMIT 1  [["id", 398]]
  Comment Load (0.1ms)  SELECT  "comments".* FROM "comments"  WHERE "comments"."pit_id" = ? AND "comments"."id" = ? LIMIT 1  [["pit_id", 398], ["id", 63]]
   (0.1ms)  begin transaction
  ActsAsVotable::Vote Load (0.1ms)  SELECT "votes".* FROM "votes"  WHERE "votes"."votable_id" = ? AND "votes"."votable_type" = ?  [["votable_id", 63], ["votable_type", "Comment"]]
  SQL (0.3ms)  DELETE FROM "comments" WHERE "comments"."id" = ?  [["id", 63]]
   (3.0ms)  commit transaction
  Rendered comments/destroy.js.erb (0.5ms)
Completed 200 OK in 13ms (Views: 3.9ms | ActiveRecord: 3.7ms)

这是我在pits/show.html.erb 中的关联标记

    <h3>Responses</h3>
  <div id = "comment_body">
    <%= render @pit.comments %>
  </div>
    <%= render partial: "comments/form" %>

坑.rb

class Pit < ActiveRecord::Base
  validates :topic, :author, :summary, presence: true
  acts_as_votable
  has_many :comments
  belongs_to :user
  mount_uploader :image, ImageUploader
end

评论.rb

class Comment < ActiveRecord::Base
  acts_as_votable
  belongs_to :pit
  belongs_to :user
end

一切都可以通过我的 create.js.erb 正确插入。我只需要删除它，我想我需要传递评论 ID 或其他类似的内容。任何建议在这里将不胜感激。谢谢。

Answer 1

实际上，评论已被删除，因为日志显示查询:

SQL (0.3ms)  DELETE FROM "comments" WHERE "comments"."id" = ?  [["id", 63]]

我猜你的 jQuery 没有在回调后删除适当的注释。您可以尝试更改_comment.html.erb的查看代码:

<div class = "well", id = "remove_comment_<%= comment.id %>">
    <p>
      <%= comment.body %>

然后是你的 destroy.js.erb:

$("#remove_comment_<%= @comment.id %>").remove(); // Since @comment will be available in the variable here!