BBS- Comments

BBS- Comments

Front-end structures

1, the reference picture, editorial area has the following elements:

• nickname:

  <p>昵称:<input type="text" id="tbCommentAuthor" class="author" disabled="disabled" size="50" value="{{ request.user.username }}"></p>

• comments:

   <textarea name="" id="id_comment" cols="60" rows="10"></textarea>

• Submit button:

  <button class="btn btn-primary" id="id_submit">提交评论</button>

{# 前端品评论区搭建 #}

{% if request.user.is_authenticated %}
    <div>
        <p><span class="glyphicon glyphicon-comment"></span>发布评论</p>
        <p>昵称:<input type="text" id="tbCommentAuthor" class="author" disabled="disabled" size="50"
                     value="{{ request.user.username }}"></p>
        <p>评论内容:</p>
        <p>
            <textarea name="" id="id_comment" cols="60" rows="10"></textarea>
        </p>
        <p>
            <button class="btn btn-primary" id="id_submit">提交评论</button>
        </p>
    </div>
{% endif %}

2 comments pages floor building

• All comments transmitted to the rear end of the list: comment_list

• When prompted example:

  Use a for loop to build the page, right

  The content of each layer is fixed

  • Number of Levels:

  <span>#{{ forloop.counter }}楼</span>

  • release time:

  <span>{{ comment.create_time|date:'Y-m-d' }}</span>

  • Publishing user

  <span><a href="/{{ comment.user.username }}/">{{ comment.user.username }}</a></span>

  • Reply button (it comes to child comment content)

  <span class="pull-right reply" comment_id="{{ comment.pk }}" username="{{ comment.user.username }}"><a>回复</a></span>

  • comments

    If a child needs to review the case in Review plus: @ username +

  <div>
  {% if comment.parent %}
  <p>@&nbsp;{{ comment.parent.user.username }}</p>
  {% endif %}
  {{ comment.content }}
  </div>

• The complete code

  <ul class="list-group">
      {% for comment in comment_list %}
          <li class="list-group-item">
              <div>
                  <span>#{{ forloop.counter }}楼</span>
                  <span>{{ comment.create_time|date:'Y-m-d' }}</span>
                  <span><a href="/{{ comment.user.username }}/">{{ comment.user.username }}</a></span>
                  <span class="pull-right reply" comment_id="{{ comment.pk }}" username="{{ comment.user.username }}"><a>回复</a></span>
                  <div>
                      {% if comment.parent %}
                      <p>@&nbsp;{{ comment.parent.user.username }}</p>
                      {% endif %}
                      {{ comment.content }}
                  </div>
              </div>
          </li>
      {% endfor %}
  
  </ul>

3, the front end js code

• Submit button function

  • Submit button to get all of the data content, user id, id comments sent to the backend via ajax

  • parentId define a global variable

  • Note that when the child is required to review the content of the comments were sliced

    if (parentId){
        let indexVal = $content.indexOf('\n') + 1;
        $content = $content.slice(indexVal);
        console.log($content)
    }

  • Write ajax function

    // 评论逻辑代码
    // 定义一个全局的parentId变量名
    let parentId = '';
    $('#id_submit').click(function () {
        // 获取textarea内容
        let $content = $('#id_comment').val();
        // 判断parentId是否有值才能确定是否切内容
        if (parentId){
            let indexVal = $content.indexOf('\n') + 1;
            $content = $content.slice(indexVal);
            console.log($content)
        }
        $.ajax({
            url: '/comment/',
            type: 'post',
            data: {
                'article_id': '{{ article_obj.pk }}',
                'content': $content,
                'csrfmiddlewaretoken': '{{ csrf_token }}',
                'parent_id': parentId,
            },
            success: function (data) {
                if(data.code == 100){
                    let userName = '{{ request.user.username }}';
                    let content = $content;
                    let tempStr = `
                    <li class="list-group-item">
                        <div>
                            <span><a href="/${userName}/">${userName}:</a></span>
                            <p>
                                ${content}
                            </p>
                        </div>
                    </li>
                    `;
                    // 查找url标签 添加子元素
                    $(".list-group").append(tempStr);
                    // 将textarea框中的内容清空
                    $('#id_comment').val('');
                    // 将全局的parentId清空
                    parentId = ''
                }
            }
        })
    });

• Reply function buttons

  • Comments child needs to be added to the user name textarea, how to get names

    let pUserName = $(this).attr('username');
    let pCommentId = $(this).attr('comment_id');

  • Wrap

    $('#id_comment').val('@'+pUserName+'\n');

  • auto focus

    $('#id_comment').focus();

  • The global assignment parent_id

    parentId = pCommentId;

rear end:

• Obtain data sent by the distal end

  article_id = request.POST.get("article_id")
  content = request.POST.get('content')
  parent_id = request.POST.get('parent_id')
  

• Check whether the user is logged

          if request.user.is_authenticated():
              with transaction.atomic():
                  # 在文章表中将普通的评论字段加1
                  models.Article.objects.filter(pk=article_id).update(comment_num = F('comment_num')+1)
                  # 在去评论表存储真正的数据
                  models.Comment.objects.create(user=request.user,article_id=article_id,content=content,parent_id=parent_id)
              back_dic['msg'] = '评论成功'
          else:
              back_dic['code'] = 110
              back_dic['msg'] = '请先登录'
      return JsonResponse(back_dic)