完成评论功能

1. 定义评论的视图函数
   @app.route('/comment/',methods=['POST'])
   def comment()：
   读取前端页面数据，保存到数据库中

   @app.route("/comment/",methods=['POST'])
   @login_re
   def comment():
       detial=request.form.get('pinglun')
       trip_id = request.form.get('tripid')
       author_id = User.query.filter(User.username == session.get('user')).first().id
       user = User.query.filter(User.username == session.get('user')).first()
       comment = Comment(detail=detial,author_id=author_id,trip_id=trip_id)
       comment.author = user
       db.session.add(comment)
       db.session.commit()
       return redirect(url_for("td",trip_id=trip_id ))

   

    

2. 用<input type="hidden" 方法获取前端的"question_id" 

    <input name="tripid" type="hidden" value="{{ tri.id }}">
   

    

3. 显示评论次数

   <h4 class="wenzi">评论:({{ tri.comments|length }})</h4>

    

4. 要求评论前登录
   

   @app.route("/comment/",methods=['POST'])
   @login_re
   def comment():

    

5. 尝试实现详情页面下的评论列表显示

   <ul style="margin-bottom: 10px">
          {% for co in tri.comments %}
              <li>
                   <br>
                   <a href="#" class="a wenzi">{{ co.author.username }}</a>
                   <span class="createtime wenzi">{{ co.creat_time }}</span>
                   <p class="wenzi">{{ co.detail }}</p>
                   <br>
   
               </li>
              <hr>
        {% endfor %}
   
               </ul>