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('/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) }}

{% for foo in questions %}            
                                                                                    {
   { foo.author.username }}                
                {
   { foo.title }}                
                发布时间:{
   { foo.creat_time }}                
{
    { foo.detail }}                
            
        {
    % endfor %}

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 }}

     
    
      
{
   { ques.title }}
    作者：{
   { ques.author.username }}       {
   { ques.creat_time }}        
     
            
{
   { ques.detail }}
            
     
            
     
                
      
                    
                           
                           
                       
      
                
      发送            
     
        
     

4.建立评论的对象关系映射：

class Comment(db.Model):

    __tablename__='comment'

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'))    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'))