登录之后更新导航
Posted 002邓诺斯
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from flask import Flask, render_template, request, redirect, url_for, 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)
# db.create_all()
@app.route(‘/‘)
def daohang():
return render_template(‘daohang.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‘)
# nickname=request.form.get(‘nickname‘)
user = User.query.filter(User.username == username).first()
if user:
session[‘user‘]=username
session.permanent=True
return redirect(url_for(‘daohang‘))
else:
return ‘error username or password‘
# if user:
# return ‘username existed‘
# else:
# user=User(username=username,password=password)
# db.session.add(user)
# db.session.commit()
return redirect(url_for(‘daohang‘))
@app.context_processor
def mycontext():
usern=session.get(‘user‘)
if usern:
return {‘username‘:usern}
else:
return {}
@app.route(‘/logout/‘)
def logout():
session.clear()
return redirect(url_for(‘regist‘))
@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 ‘username existed‘
else:
user = User(username=username, password=password)
db.session.add(user)
db.session.commit()
return redirect(url_for(‘login‘))
@app.route(‘/biaoqian/‘)
def biaoqian():
return render_template(‘biaoqian.html‘)
if __name__ == ‘__main__‘:
app.run(debug=True)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>{% block title %}{% endblock %}首页</title>
<link type="text/css" rel="stylesheet" href="{{ url_for(‘static‘,filename=‘/css/index.css‘) }}">
<script src="{{ url_for(‘static‘,filename=‘js/moonlight.js‘) }}"></script>
{% block head %}{% endblock %}
</head>
<body id="myBody">
<nav>
<img src="http://cdn2.jianshu.io/assets/web/logo-58fd04f6f0de908401aa561cda6a0688.png" width="40px">
<a href="{{ url_for(‘daohang‘) }}">首页</a>
<a href="http://www.jianshu.com/">下载app</a>
<input type="text" name="search">
<button type="submit">搜索</button>
{% 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(‘regist‘) }}">注册</a>
{% endif %}
<a href="{{ url_for(‘biaoqian‘) }}">发布问答</a>
<img id="myOnOff" src="http://www.runoob.com/images/pic_bulbon.gif" onclick="mySwitch()" width="20px">
</nav>
{% block main %}{% endblock %}
<p>{{ username }}contextx</p>
</body>
</html>
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