话不多说，直接上干货
先引用插件
from flask import Flask, render_template, session, request, redirect
from flask_sqlalchemy import SQLAlchemy
from flask_session import Session
import pymysql
import redis
再完成相关的配置
pymysql.install_as_MySQLdb()
# 初始化Session对象
f_session = Session()
app = Flask(__name__)
# 设置连接数据库的URL
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:[email protected]:3306/xiangqin'
# 数据库和模型类同步修改
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True
# 查询是会显示原始SQL语句
app.config['SQLALCHEMY_ECHO'] = True
db = SQLAlchemy(app)
app.config['SECRET_KEY'] = 'laowangaigebi' # 加密的密钥
app.config['SESSION_USE_SIGNER'] = True # 是否对发送到浏览器上session的cookie值进行加密
app.config['SESSION_TYPE'] = 'redis' # session类型为redis
app.config['SESSION_KEY_PREFIX'] = 'session:' # 保存到session中的值的前缀
app.config['PERMANENT_SESSION_LIFETIME'] = 7200 # 失效时间 秒
app.config['SESSION_REDIS'] = redis.Redis(host='127.0.0.1', port='6379', db=4) # redis数据库连接
# 绑定flask的对象
f_session.init_app(app)
app.config['SECRET_KEY'] = 'xiaohuaxiaohua' #设置session加密的密钥
登录视图的实现
简单的登录页面
@app.route('/login/', methods=['GET', 'POST'])
def login():
if request.method == 'GET':
return render_template('login.html')
elif request.method == 'POST':
name = request.form.get('name')
password = request.form.get('password')
user = User.query.filter_by(name=name).first()
if user:
if password != user.password:
return render_template('login.html')
else:
session['uid'] = user.id
session['islogin'] = 1
return redirect('/index/')
else:
cxt = {
'error': '没有此用户'
}
return render_template('login.html', **cxt)
注册视图的实现
简单的注册页面
@app.route('/register/', methods=['GET', 'POST'])
def register():
if request.method == 'GET':
return render_template('register.html')
elif request.method == 'POST':
name = request.form.get('name')
password = request.form.get('password')
password1 = request.form.get('password1')
gender = request.form.get('gender')
user = User.query.filter_by(name=name).first()
if user:
cxt = {
'error': '该用户名已存在，请重新创建'
}
return render_template('register.html', **cxt)
else:
if password != password1:
cxt = {
'error': '两次密码不一致，请重新输入'
}
return render_template('register.html', **cxt)
else:
user_s = User(name=name, password=int(password), gender=int(gender))
db.session.add(user_s)
db.session.commit()
return redirect('/login/')
退出登录的实现
@app.route('/logout/')
def logout():
session.clear()
return redirect('/index/')
首页的展示用户信息以及状态保持，我做的是一个贼简单的相亲网站，只展示与自己相反性别的人
简单的首页
{% if islogin == 1 %}
欢迎{{ user.name }}
退出登录
{% for foo in list_obj %}
-
{{ foo.name }}--{{ foo.set() }}
{% endfor %}
{% else %}
去登录
{% endif %}
@app.route('/index/')
def index():
uid = session.get('uid')
islogin = session.get('islogin')
if uid:
user = User.query.filter_by(id=uid).first()
obj = User.query.offset(user.gender).all()
print(obj)
list_obj = []
for i in obj:
if i.id != user.id:
list_obj.append(i)
cxt = {
'user': user,
'islogin': islogin,
'obj': obj,
'list_obj': list_obj
}
return render_template('index.html', **cxt)
else:
return render_template('index.html')
完整代码（包含数据库创建以及模型类的创建查询）
from flask import Flask, render_template, session, request, redirect
from flask_sqlalchemy import SQLAlchemy
from flask_session import Session
import pymysql
import redis
pymysql.install_as_MySQLdb()
# 初始化Session对象
f_session = Session()
app = Flask(__name__)
# 设置连接数据库的URL
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:[email protected]:3306/xiangqin'
# 数据库和模型类同步修改
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True
# 查询是会显示原始SQL语句
app.config['SQLALCHEMY_ECHO'] = True
db = SQLAlchemy(app)
app.config['SECRET_KEY'] = 'laowangaigebi' # 加密的密钥
app.config['SESSION_USE_SIGNER'] = True # 是否对发送到浏览器上session的cookie值进行加密
app.config['SESSION_TYPE'] = 'redis' # session类型为redis
app.config['SESSION_KEY_PREFIX'] = 'session:' # 保存到session中的值的前缀
app.config['PERMANENT_SESSION_LIFETIME'] = 7200 # 失效时间 秒
app.config['SESSION_REDIS'] = redis.Redis(host='127.0.0.1', port='6379', db=4) # redis数据库连接
# 绑定flask的对象
f_session.init_app(app)
app.config['SECRET_KEY'] = 'xiaohuaxiaohua' #设置session加密的密钥
@app.route('/index/')
def index():
uid = session.get('uid')
islogin = session.get('islogin')
if uid:
user = User.query.filter_by(id=uid).first()
obj = User.query.offset(user.gender).all()
print(obj)
list_obj = []
for i in obj:
if i.id != user.id:
list_obj.append(i)
cxt = {
'user': user,
'islogin': islogin,
'obj': obj,
'list_obj': list_obj
}
return render_template('index.html', **cxt)
else:
return render_template('index.html')
@app.route('/login/', methods=['GET', 'POST'])
def login():
if request.method == 'GET':
return render_template('login.html')
elif request.method == 'POST':
name = request.form.get('name')
password = request.form.get('password')
user = User.query.filter_by(name=name).first()
if user:
if password != user.password:
return render_template('login.html')
else:
session['uid'] = user.id
session['islogin'] = 1
return redirect('/index/')
else:
cxt = {
'error': '没有此用户'
}
return render_template('login.html', **cxt)
@app.route('/register/', methods=['GET', 'POST'])
def register():
if request.method == 'GET':
return render_template('register.html')
elif request.method == 'POST':
name = request.form.get('name')
password = request.form.get('password')
password1 = request.form.get('password1')
gender = request.form.get('gender')
user = User.query.filter_by(name=name).first()
if user:
cxt = {
'error': '该用户名已存在，请重新创建'
}
return render_template('register.html', **cxt)
else:
if password != password1:
cxt = {
'error': '两次密码不一致，请重新输入'
}
return render_template('register.html', **cxt)
else:
user_s = User(name=name, password=int(password), gender=int(gender))
db.session.add(user_s)
db.session.commit()
return redirect('/login/')
@app.route('/logout/')
def logout():
session.clear()
return redirect('/index/')
'''创建模型类'''
class User(db.Model):
# 定义表名
__tablename__ = 'tbl_user'
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(32), unique=True)
password = db.Column(db.String(32), unique=True)
gender = db.Column(db.SmallInteger, default=0)
def set(self):
if self.gender == 0:
return '女'
else:
return '男'
if __name__ == '__main__':
app.run(host='0.0.0.0', port=5000, debug=True)
# db.drop_all()
# db.create_all() # 创建表
#
# user1 = User(name='zs', password='123456', gender=1)
# db.session.add(user1)
# db.session.commit()