1.主PY文件写视图函数，带id参数。 

@app.route('/detail/
     
      ')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) }}

                        ｉｄ：{
   { foo.author.username }}            
            标题：{
   { foo.title }}            
            
详情：{
   { foo.detail }}
            
       　　 {
   { foo.creat_time }}        

 

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 }}

 

{% extends 'base2.html' %}{% block title %}问答详情{% endblock %}{% block main %}        
     
            
      
详情页
    
      
{
   { ques.title }}
{
   { ques.author.username }}{
   { ques.creat_time }}
             
     
    
{
   { ques.detail }}
    
     
    
     
    
      
       
       
      
    
      发布    
     
    
     
{% endblock %}

 

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。

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'))    question_id = db.Column(db.Integer, db.ForeignKey('question.id'))    detail = db.Column(db.Text, nullable=False)    create_time = db.Column(db.DateTime, default=datetime.now)    question = db.relationship('Question', backref=db.backref('comments',order_by=create_time.desc))    author = db.relationship('User', backref=db.backref('comments'))