从首页问答标题到问答详情页

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) 

2. @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)
   

   　　

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

5. {% block main%}
   <p>{{user}} context</p>
   <ul class="list-group">
   {% for foo in questions %}
       <li class="list-group-item">
           <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
           <a href="#">{{ foo.author.username }}</a>
           <br>
           <a href="{{ url_for('detail',question_id=foo.id) }}">{{ foo.title }}</a>
           <span class="badge">{{ foo.creat_time }}</span>
           <p style="color:black">{{ foo.detail }}</p>
       </li>
   {% endfor %}
   </ul>
   {% endblock %}

    

6. 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 }}

7. {% extends 'base.html' %}
   {% block title %}问答{% endblock %}
   {% block main %}
   <div class="page-header">
   <h3>题目：{{ ques.title }}<br><small>作者：{{ ques.author }} 时间：{{ ques.create_time }}</small></h3>
   </div>
   <p class="lead">detail{{ ques.detail }}</p>
   <hr>
   <form action="{{ url_for('question') }}" method="post">
   <div class="form-group">
   <textarea name="new_comment" class="form-control" rows="3" id="new_comment" placeholder="write your comment"></textarea>
   </div>
   <button type="submit" class="btn btn-default">提交</button>
   </form>
   <ul class="list-group" style="margin: 10px"></ul>
   
   {% endblock %}

    

8. 建立评论的对象关系映射：

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

9. class Comment(db.Model):
       __tablename__ = 'comment'
       id = db.Column(db.Integer, primary_key=True, autoincrement=True)
       author_id = db.Column(db.Integer, db.ForeignKey('user.id'))
       sent_id = db.Column(db.Integer, db.ForeignKey('sent.id'))
       creat_time = db.Column(db.DateTime, default=datetime.now)
       detail = db.Column(db.TEXT, nullable=False)
       sent = db.relationship('Sent', backref=db.backref('comment'))
       author = db.relationship('User', backref=db.backref('comment'))
   

   　　

10.  尝试实现发布评论。