登录之后更新导航

用上下文处理器app_context_processor定义函数
1. 获取session中保存的值
2. 返回字典
在父模板中更新导航，插入登录状态判断代码。
1. 注意用{% ... %}表示指令。
2. {{ }}表示变量

完成注销功能。

清除session

跳转

from flask import Flask,render_template,request,redirect,url_for,session
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
import config

app = Flask(__name__)
#app.config['SECRET_KEY'] = '1234567'
app.config.from_object(config)
db = SQLAlchemy(app)

class User(db.Model):
    __tablename__ = 'user_test'
    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))
    tel = db.Column(db.String(20))

#db.create_all()

#2.在表中插入一条记录
#user = User(username = 'mis1',password = '124', nickname='wk')
#db.session.add(user)
#db.session.commit()


#3.去表中查询用户名对应的密码和接下来用户输入的密码是否相匹配
#user = User.query.filter(User.username == 'mis1234').first()
#print(user)
#print(user.id,user.username)#输出查找到的用户名的id,密码等.

#修改查询到的用户名的密码等
#user = User.query.filter(User.username == 'mis1234').first()
#user.password = '123'
#db.session.commit()

#再次插入一条记录
#user = User(username = 'wkkkkkk',password = '123456', nickname='kk')
#db.session.add(user)
#db.session.commit()

#删除一条记录
#user = User.query.filter(User.username == 'mis1234').first()
#db.session.delete(user)
#db.session.commit()




@app.route('/')
def index():
    return render_template('base.html')

@app.route('/login/',methods=['GET','POST'])
def login():
    if request.method == 'GET':
        return render_template('login.html')
    else:
        usern = request.form.get('uname')
        passw = request.form.get('upass')
        user = User.query.filter(User.username==usern).first()
        if user:
            if user.password == passw:
                session['user'] = usern;
                return redirect(url_for('index'))
            else:
                return 'password error!'
        else:
            return 'username is not exister!'



@app.route('/register/',methods=['GET','POST'])
def register():
    if request.method =='GET':
        return  render_template('register.html')
    else:
        usern = request.form.get('uname')
        teln = request.form.get('number')
        passw = request.form.get('upass')
        user = User.query.filter(User.username==usern).first()
        if user:
            return 'username existed'
        else:
            user1= User(username=usern,tel=teln,password=passw)
            db.session.add(user1)
            db.session.commit()
            return redirect(url_for('login'))


@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('index'))


@app.route('/question/',methods=['GET','POST'])
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>父模板</title>-->
    <title>{% block title%}
    {% endblock %} wk </title>
    <!--<script src="../static/js/base.js" type="text/javascript"></script>-->

    <script src="{{ url_for('static',filename='js/base.js') }}" type="text/javascript"></script>
    <link rel="stylesheet" href="../static/css/base.css">
    {% block head %}
    {% endblock %}




</head>
<body id="myBody">
<nav id="nav"  >
    <!--<img id="on_off" onclick="mySwitch()" src="http://www.runoob.com/images/pic_bulbon.gif" > -->

    <img id="on_off" onclick="mySwitch()" src="{{ url_for('static',filename='image/switchon.gif') }}" >


    <a id="href" href="">学生</a>
    <a id="href" href="">教师</a>
    <a id="href" href="">校友</a>
    <input id="search" type="text" name="search">
    <input id="button1" type="button" name="sousuo" value="搜索">
    <!--<input  onclick="window.location.replace('login.html')"  id="button" type="button" name="login" value="登录">
    <input   onclick="window.location.replace('register.html')" id="button" type="button" name="login" value="注册"><br>-->

    <!--<a id="href" href="{{ url_for('login') }}">login</a>
    <a id="href" href="{{ url_for('register') }}">register</a>
    <a id="href" href="{{ url_for('question') }}">question</a> -->

    {% if username %}
        <a id="href" href="#">{{ username }}</a>
        <a id="href" href="{{ url_for('logout')}}">logout</a>
    {% else %}
        <a id="href" href="{{ url_for('login') }}">login</a>
        <a id="href" href="{{ url_for('register') }}">register</a>

    {% endif %}

</nav>


<div class="daohang">
    <div class="map">
        用户导航
        <hr>
    </div>
    <div class="img">
        <a href="http://www.gzcc.cn/">
            <!--<img src="http://www.gzcc.cn/2016/images/yhdh/01.jpg">-->
            <img src="{{ url_for('static',filename='image/01.jpg') }}">
        </a>
        <div class="desc"><a href="http://www.gzcc.cn/html/xueyuanrongyu/">学校荣誉</a> </div>
    </div>
    <div class="img">
        <a href="http://www.gzcc.cn/">
            <img src="{{ url_for('static',filename='image/02.jpg') }}">
        </a>
        <div class="desc"><a href="http://www.gzcc.cn/html/banxuechengguo/">师生获奖</a> </div>
    </div>
    <div class="img">
        <a href="http://www.gzcc.cn/">
            <img src="{{ url_for('static',filename='image/03.jpg') }}">
        </a>
        <div class="desc"><a href="http://www.gzcc.cn/html/xygk/ldgh/">领导关怀</a> </div>
    </div>
    <div class="img">
        <a href="http://www.gzcc.cn/">
            <img src="{{ url_for('static',filename='image/08.jpg') }}">
        </a>
        <div class="desc"><a href="http://i.gzcc.cn" target="_blank">数字广商</a> </div>
    </div>
    <div class="img">
        <a href="http://www.gzcc.cn/">
            <img src="{{ url_for('static',filename='image/05.jpg') }}">
        </a>
        <div class="desc"><a href="http://www.gzcc.cn/html/xygk/xiaoyuanfengguang/">画说校园</a> </div>
    </div>
    <div class="img">
        <a href="http://www.gzcc.cn/">
            <img src="{{ url_for('static',filename='image/06.jpg') }}">
        </a>
        <div class="desc"><a href="http://www.gzcc.cn/html/shipinxiaoyuan/">视频校园</a> </div>
    </div>
    <div class="img">
        <a href="http://www.gzcc.cn/">
            <img src="{{ url_for('static',filename='image/07.jpg') }}">
        </a>
        <div class="desc"><a href="http://www.gzcc.cn/quanjingxiaoyuan/tour.html">全景校园</a> </div>
    </div>
    <div class="img">
        <a href="http://www.gzcc.cn/">
            <img src="{{ url_for('static',filename='image/04.jpg') }}">
        </a>
        <div class="desc"><a href="http://www.gzcc.cn/html/xiaoyoufengcai/">校友风采</a></div>
    </div>

</div>
{% block main %}
{% endblock %}
<div class="footer" >
    版权所有:wk
</div>
</body>
</html>

posted @ 2017-11-24 11:40 091王卡阅读(171) 评论(0) 收藏举报

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