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

@app.route('/pinglun/<question_id>')
def detial(question_id):
    quest=Question.query.filter(Question.id==question_id).first()
    return render_template('commentdetail.html',que=quest)

<a href="{{ url_for('commentdetail',question_id=foo.id) }}">{{ foo.title}}</a>

{% for foo in question %}
    <li class="list-group-item">
        <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
        <a href="{{ url_for('commentdetail',question_id=foo.id) }}">{{ foo.title}}</a>
        <p style="...">{{ foo.detail}}</p>
        <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
        <span class="badge">{{ foo.creat_time}}</span>

    </li>
 {% endfor %}

class Question(db.Model):
    __tablename__ = 'comment'
    id =db.Column(db.Integer,primary_key=True,autoincrement=True)
    author_id=db.Column(db.Integer,db.ForeignKey('uesr.id'))
    question_id=db.Column(db.Integer,db.ForeignKey('question.id'))
    creat_time=db.Column(db.DateTime,default=datetime.now)
    detail=db.Column(db.Text,nullable=False)
    question =db.relationship('Question',backref=db.backref('comments'))
    author=db.relationship('User',backref=db.backref('comments'))