制作首页的显示列表

1. 在首页添加显示问答的列表，并定义好相应的样式。

无序列表

<ul >

  <li>Coffee</li>

  <li>Tea</li>

  <li>Milk</li>

</ul>

2. 用字典向index.html传递参数。

{% extends 'moban.html' %}
{% block questiontitle %}问答界面{% endblock %}
{% block questionhead %}{% endblock %}
 
{% block questionbody %}
    <p>{{ user }} context</p>
    <ul class="list-group" style="">
        <li>
            <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
            <a href="#">用户名</a>
            <br>
             <div class="from-group">
                <label for="gb"> 标题 </label><br>
                <textarea class="from-control" cols="50" rows="1" id="gb" name="title"></textarea>
             </div>
             <div class="from-group">
                <label for="gb1">内容</label><br>
                 <textarea class="from-control" cols="50" rows="10" id="gb1" name="detail"></textarea><br>
                <button type="submit">发布</button>

 from flask import Flask, render_template, request, redirect, url_for, session
 from flask_sqlalchemy import SQLAlchemy
import config
 from datetime import datetime
 from functools import wraps
  
 app = Flask(__name__)
 app.config.from_object(config)
 db = SQLAlchemy(app)
  
  
 class User(db.Model):
     __tablename__ = 'user'
     id = db.Column(db.Integer, primary_key=True, autoincrement=True)
     username = db.Column(db.String(20), nullable=False)
     password = db.Column(db.String(20), nullable=False)
     nickname = db.Column(db.String(20), nullable=True)
  
 class Question(db.Model):
     __tablename__ = 'question'
     id = db.Column(db.Integer, primary_key=True, autoincrement=True)
     title = db.Column(db.String(100), nullable=False)
     detail = db.Column(db.Text, nullable=False)
     creat_time = db.Column(db.DateTime, default=datetime.now)
     author_id = db.Column(db.Integer, db.ForeignKey('user.id'))
     author = db.relationship('User', backref=db.backref('question'))

@app.route('/')
def moban():
    return render_template('moban.html')
 
 
@app.route('/login/', methods=['GET', 'POST'])  # 跳转登陆,methods定义它有两种请求方式
def login():
    if request.method == 'GET':
        return render_template('login.html')
    else:
        username = request.form.get('user')
        password = request.form.get('psw')
        user = User.query.filter(User.username == username).first()  # 判断用户名是否存在
        if user:
           if user.password == password:
               session['user']=username
               session.permanent = True
               return redirect(url_for('moban'))
        else:
            return '用户名不存在'
 
 
@app.context_processor
def mycontext():
    username=session.get('user')
    if username:
        return {'username':username}
    else:
        return {}
 
def loginFirst(func): #参数是函数
    @wraps(func)
    def wrapper(*args, ** kwargs): #定义个函数将其返回
        if session.get('user'):
            return func(*args, ** kwargs)
        else:
            return redirect(url_for('login'))
    return wrapper #返回一个函数
 
@app.route('/register/', methods=['GET', 'POST'])  # 跳转注册,methods定义它有两种请求方式
def register():
    if request.method == 'GET':
        return render_template('register.html')
    else:
 
        username = request.form.get('user')
        password = request.form.get('psw')
        nickname = request.form.get('nickname')
        user = User.query.filter(User.username == username).first()  # 判断用户名是否存在
        if user:
            return u'该用户已存在'
        else:
            user = User(username=username, password=password, nickname=nickname)
            db.session.add(user)
            db.session.commit()
            return redirect(url_for('login'))
 
@app.route('/logout/')
def logout():
    session.clear()
    return render_template('moban.html')
 
@app.route('/question/',methods=['GET', 'POST'])  # 跳转注册,methods定义它有两种请求方式
@loginFirst
def question():
    if request.method == 'GET':
        return render_template('question.html')
    else:
        title = request.form.get('title')
        detail = request.form.get('detail')
        author_id = User.query.filter(User.username == session.get('user')).first().id
        question = Question(title = title,detail =detail,author_id = author_id)
        db.session.add(question)
        db.session.commit()
        return redirect(url_for('moban'))
 
 
if __name__ == '__main__':
    app.run(debug=True)