从首页问答标题到问答详情页

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1. 主PY文件写视图函数，带id参数。 

   @app.route('/detail/<question_id>')
   def detail(question_id):
       quest = 
       return render_template('detail.html', ques = quest)

   @app.route('/question/',methods=['GET','POST'])
   @loginFirst
   def question():
       if request.method=='GET':
           return render_template('question.html')
       else:
           title=request.form.get('title')
           detail=request.form.get('detail')
           author_id=User.query.filter(User.username==session.get('user')).first().id
           question = Question(title=title,detail=detail,author_id=author_id)
           db.session.add(question)  # 数据库，添加操作
           db.session.commit()
           return redirect(url_for('myweb'))
   
   @app.route('/detail/<question_id>')
   def detail(question_id):
       quest=Question.query.filter(Question.id == question_id).first()
       return render_template('detail.html',ques=quest)
   

   　　

    

2. 首页标题的标签做带参数的链接。
         {{ url_for('detail',question_id = foo.id) }}
   

   {% block main%}
   <img src="{{url_for('static',filename='images/qalogo.png')}}" alt="qa">
   <ul class="list-group" style="">
   <!--<p>{{user}} context</p>-->
       {% for foo in question %}
       <li class="list-group-item">
           <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
           <a href="{{url_for('detail',question_id=foo.id)}}">{{foo.title}}</a>
           <p style="">{{foo.detail}}</p>
           <span class="glyphicon glyphicon-user" aria-hidden="true"></span>
           <a href="{{url_for('usercenter',user_id=foo.author_id)}}">{{foo.author.username}}评论:({{foo.comments|length}})</a>
           <span class="badge">{{foo.creat_time}}</span>
           <p style="color:black">内容</p>
       </li>
       {% endfor %}
   </ul>
   {% endblock %}
   

   　　

3. 在详情页将数据的显示在恰当的位置。 

   {{ ques.title}}
   {{ ques.id  }}{{  ques.creat_time }}

   {{ ques.author.username }} 
   {{ ques.detail }}

4. 建立评论的对象关系映射：

   class Comment(db.Model):
       __tablename__='comment'

5.  尝试实现发布评论。
    

   <div class="page-header" xmlns="http://www.w3.org/1999/html">
   <h3>{{ques.id}}{{ques.title}}<br>
       <small>{{ques.author.username}}<span class="badge"{{ques.creat_time}}></span></small></h3>
   </div>
   <p class="lead">{{ques.detail}}</p>
   <hr>
   
   <form action="{{url_for('comment')}}" method="post" style="">
       <div class="form-group">
           <textarea name="new_comment" class="form-control" rows="3" id="new-comment" placeholder="write your comment"></textarea>
           <input type="hidden" name="question_id" value="{{ques.id}}">
       </div>
       <button type="submit" class="btn btn-default">发送</button>
   </form>
   <!--<h4>评论:({{ques.comments|length}})</h4>-->
   <!--<ul class="list-group" style="">-->
       <!--{% for foo in ques.comments%}-->
       <!--<li class="list-group-item">-->
           <!--<span class="=glyphicon glyphicon-heart-empty " aria-hidden="true"></span>-->
           <!--<a href="#">{{foo.author.username}}</a>-->
           <!--<span class="badge">{{foo.creat_time}}</span>-->
           <!--<p style="">{{foo.detail}}</p>-->
       <!--</li>-->
       {%endfor%}
   </ul>
   

   　　

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