完成个人中心—导航标签

1. 个人中心—视图函数带标签页面参数tag
   @app.route('/usercenter/<user_id>/<tag>')
   def usercenter(user_id, tag):
      if tag == ‘1':
          return render_template('usercenter1.html', **context)
   

   @app.route('/user_detail/<user_id>/<tag>')
   @login_first
   def user_detail(user_id,tag):
       user=User.query.filter(User.id == user_id).first()
       context={
           "user":user
       }
       if tag=="1":
           return render_template("user_detail.html",**context)
       elif tag == "2":
           return render_template("user_detail1.html",**context)
       else:
           return render_template("user_detail2.html",**context)

2. 个人中心—导航标签链接增加tag参数
   <li role=“presentation”><a href=“{{ url_for(‘usercenter’,user_id = user.id,tag = ‘1’) }}">全部问答</a></li>
   

   <ul class="u_ul">
           <li role="presentation"><a href="{{ url_for("user_detail",user_id = user.id,tag="1")}}">全部问答</a></li>
           <li role="presentation"><a href="{{ url_for("user_detail",user_id = user.id,tag="2")}}">全部评论</a></li>
           <li role="presentation"><a href="{{ url_for("user_detail",user_id = user.id,tag="3")}}">个人信息</a></li>
       </ul>

3. 个人中心—有链接到个人中心页面的url增加tag参数
    <a href="{{ url_for('usercenter',user_id = session.get('userid'), tag=1) }}">{{ session.get('user') }}</a>

4. detail.html

   <a class="nickname" target="_blank" href="{{ url_for('user_detail',user_id=foo.author_id,tag=1) }}">{{ foo.author.username }}<span class="time">{{ foo.create_time }}</span></a>

   base.html
   
   <a href="{{ url_for('user_detail',user_id=session.get("userid"),tag=1) }}">{{ username }}</a>

   first.html
   
   <a href="{{ url_for('user_detail',user_id=session.get("userid"),tag=1) }}">{{ foo.author.username }}<span>{{ foo.create_time }}</span></a>