完成评论功能

1. 定义评论的视图函数
   @app.route('/comment/',methods=['POST'])
   def comment()：
   读取前端页面数据，保存到数据库中
2. 用<input type="hidden" 方法获取前端的"question_id" 
3. 显示评论次数
4. 要求评论前登录
5. 尝试实现详情页面下的评论列表显示

@app.route('/comment/',methods=['POST'])
def comment():
    comment = request.form.get('new-comment')
    ques_id = request.form.get('question_id')
    auth_id = User.query.filter(User.username == session.get('user')).first().id
    comm = Comment(author_id = auth_id, question_id=ques_id ,detail=comment)
    db.session.add(comm)
    db.session.commit()
    return  redirect(url_for('detail'))

@app.route('/comment/',methods=['POST'])
@loginFrist
def comment():
comment = request.form.get('new-comment')
ques_id = request.form.get('question_id')
auth_id = User.query.filter(User.username == session.get('user')).first().id
comm = Comment(author_id = auth_id, question_id=ques_id ,detail=comment)
db.session.add(comm)
db.session.commit()
return redirect(url_for('detail',question_id=ques_id))

用<input type="hidden" 方法获取前端的"question_id" 

<input type="hidden"  name="question_id" value="{{ques.id}}" />

显示评论次数

<h4>评论:({{ ques.comments|length }}) </h4>