from flask import Flask, render_template, url_for, redirect, request,session
from flask_sqlalchemy import SQLAlchemy
import config
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))
db.create_all()
# 增加
# user = User(username='tan1997',password='19961021')
# db.session.add(user)
# db.session.commit()
# 查询
# user = User.query.filter(User.username == 'tan1997').first()
# print(user.username,user.password)
# 修改
# user=User.query.filter(User.username == 'tan1997').first()
# user.password=1234567
# db.session.commit()
# 删除
# user=User.query.filter(User.username == 'tan1997').first()
# db.session.delete(user)
# db.session.commit()
@app.route('/')
def myweb():
return render_template("myweb.html")
@app.route('/login/', methods=['GET', 'POST'])
def login():
if request.method == 'GET':
return render_template("login.html")
else:
username = request.form.get('username')
password = request.form.get('password')
user = User.query.filter(User.username == username).first()
if user:
if user.password == password:
session['user'] = username
session.permannet = True
return redirect(url_for('myweb'))
else:
return '密码错误'
else:
return '用户名不存在'
@app.context_processor
def mycontext():
usern = session.get('user')
if usern:
return {'username':usern}
else:
return {}
@app.route('/regist/', methods=['GET', 'POST'])
def regist():
if request.method == 'GET':
return render_template("regist.html")
else:
username = request.form.get('username')
password = request.form.get('password')
nickname = request.form.get('nickname')
user = User.query.filter(User.username == username).first()
if user:
return ' 用户名已存在'
else:
user = User(username=username, password=password, nickname=nickname)
db.session.add(user) # 数据库，添加操作
db.session.commit()
return redirect(url_for('login'))
@app.route('/question/')
def question():
return render_template("question.html")
if __name__ == '__main__':
app.run(debug=True)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8"/>
<title>主页 {% block logintitle %}
{% endblock %}
{% block registtitle %}
{% endblock %}
{% block questiontitle %}
{% endblock %}
</title>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
<link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='css/myweb.css') }}">
<script src="{{ url_for('static',filename='js/switch.js') }}"></script>
{% block loginhead %}
{% endblock %}
{% block registhead %}
{% endblock %}
{% block questionhead %}
{% endblock %}
</head>
<body id="myBody" style="background-image: url(../static/img/demo-1-bg.jpg)">
<>
<li><img class="ico" src="../static/img/ico.jpg" alt="" style="margin-top: 12px"></li>
<li><a href="{{ url_for('myweb') }}">首页</a></li>
<li><input type="text" class="form-control" placeholder="Search" style="margin-top: 8px" ></li>
<li><button type="submit" class="btn btn-default" style="margin-top: 8px">搜索</button></li>
<li><a href="{{ url_for('question') }}">提问</a></li>
{% if username %}
<li><a href="#">{{ username }}</a></li>ｕｌ
<li><a href="#">注销</a></li>
{% else %}
<li style="float:right"><a href="{{ url_for('login') }}">登陆</a></li>
<li style="float:right"><a href="{{ url_for('regist') }}">注册</a></li>
{% endif %}
<li style="float: right"> <img id="myOnOff" onclick="mySwitch()" src="http://www.runoob.com/images/pic_bulbon.gif" class="bulb"></li>
</ul>
<footer>
<div class="footer_box">
<p>Posted by: W3School</p>
<p>Contact information: <a href="mailto:someone@example.com">someone@example.com</a>.</p>
</div>
</footer>
{% block loginbody %} {% endblock %}
{% block registbody %} {% endblock %}
{% block questiontbody %} {% endblock %}
</body>
</html>