1.py文件
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 Wenda(db.Model):
__tablename__ = 'wenda'
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('wenda'))
# db.create_all() #是否链接成功
# 数据添加
# user=User(username='ma',password='gg')
# db.session.add(user)
# db.session.commit()
#
#
# 数据更新
#
# user = User.query.filter(User.username=='hh').first()
# user.password='gg'
# db.session.commit()
#
#
# 数据查询
# user = User.query.filter(User.username=='ma').first()
# print(user.username,user.password)
#
# 数据删除
# user = User.query.filter(User.username=='ma').first()
# db.session.delete(user)
# db.session.commit()
# session会话连接
# filter()过滤器
# route制定路径和函数之间的关系
# def定义一个变量
@app.route('/')
def moban():
context = {
'user':'hhhhhh'
}
return render_template('moban.html',**context)
@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('/wenda/',methods=['GET', 'POST']) # 跳转注册,methods定义它有两种请求方式
@loginFirst
def wenda():
if request.method == 'GET':
return render_template('wenda.html')
else:
title = request.form.get('title')
detail = request.form.get('detail')
author_id = User.query.filter(User.username == session.get('user')).first().id
wenda = Wenda(title = title,detail =detail,author_id = author_id)
db.session.add(wenda)
db.session.commit()
return redirect(url_for('moban'))
if __name__ == '__main__':
app.run(debug=True)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>
学校首页
{% block logintitle %}{% endblock %}
{% block registertitle %}{% endblock %}
{% block wendatitle %}{% endblock %}
</title>
{% block loginhead %}{% endblock %}
{% block registerhead %}{% endblock %}
{% block wendahead %}{% endblock %}
</head>
<body id="myBody" style="background-color: lightcyan">
<nav>
<img src="{{ url_for('static',filename='image/gzsxy.png') }}" width="2200px" >
<br>
<script>
document.write(Date())
</script>
<br>
<a href="{{ url_for('moban') }}">首页</a>
{% if username %}
<a href="#">{{ username }}</a>
<a href="{{ url_for('logout') }}">注销</a>
{% else %}
<a href="{{ url_for('login') }}" >登录</a>
<a href="{{ url_for('register') }}">注册</a>
{% endif %}
<a href="{{ url_for('wenda') }}">问答</a>
<input type="text" placeholder="请输入关键字">
<button type="submit">搜索</button>
</nav>
<p>欢迎登陆{{ username }}</p>
<div class="list_container">
<ul class="news-list">
<li class="list-group-item">
<span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
<a href="#">{{ user }}</a>
<br>
<a href="#">标题</a>
<br>
<span class="badge">时间</span>
<p style="background-color: aqua">内容</p>
</li>
</ul>
</div>
{% block loginbody %}{% endblock %}
{% block registerbody %}{% endblock %}
{% block wendabody %}{% endblock %}
</body>
</html>
