但是会影响性能,所有需要建立数据库连接池# conn = pymysql.connect(host='127.0.0.1', port=3306, database='luffy_api', user='root', password='123')# cursor = conn.cursor()@app.route('/banner')defbanner():# 从池中拿链接,创建出cursor对象# conn = POOL.connection()# cursor...
类似地,我们可以配置第二个MySQL数据库连接。在配置文件中,我们需要指定第二个数据库连接的URL、用户名、密码等信息。 # config.pyDB2_HOST='localhost'DB2_USER='user2'DB2_PASSWORD='password2'DB2_NAME='database2'DB2_URL=f'mysql://{DB2_USER}:{DB2_PASSWORD}@{DB2_HOST}/{DB2_NAME}' 1. 2. 3....
使用pip按照的方法为:pip install flask-sqlalchemy==2.1 (3)2.1版本应该也有问题,因为app、models、database三个功能类文件分开的话,只有第一次读取数据是从数据库读取,剩下的读取过程好像都是从内存中读取的。但是如果把所有的内容都放到app文件中就不存在这个问题(这就是我把所有内容都放到一个文件的原因)。这...
database='pooldb', charset='utf8' ) @app.route('/func') def func(): conn = POOL.connection() cursor = conn.cursor() cursor.execute('select * from tb1') result = cursor.fetchall() cursor.close() conn.close() # 不是真的关闭,而是假的关闭。 conn = pymysql.connect() conn.close...
defconnect_db():# Connects to the database and takes care of the connectionreturnPersistentDB( creator=pymysql, host='db', user='root', password='myPassword', database='databaseName', port=3306, autocommit=True, charset='utf8mb4', ...
SQLALCHEMY_DATABASE_URI='mysql://root:root@localhost:3306/flask01' SQLALCHEMY_TRACK_MODIFICATIONS=True SQLALCHEMY_COMMIT_ON_TEAR=True SQLALCHEMY_ECHO=True app.config.from_object(Config) class Roles(db.Model): __tablename__='roles' id=db.Column(db.Integer,autoincrement=True,primary_key=True...
password='password',db='test',charset='utf8mb4',cursorclass=pymysql.cursors.DictCursor)try:withconnection.cursor()ascursor:sql="CREATE TABLE users (id INT, name VARCHAR(20), email VARCHAR(30))"cursor.execute(sql)connection.commit()finally:connection.close()return'Database created successfully!
app.config['SQLALCHEMY_DATABASE_URI']='mysql://root:root@172.27.1.221:3306/env' 然后我们创建一个models.py from__init__import* fromflask_securityimportRoleMixin,UserMixin #Createdatabaseconnectionobject db=SQLAlchemy(app) #Definemodels
I'm building a basic Flask Application with an an AngularJS front end and I am currently at the point where I need to make a connection to a MySQL database I have hosted with Godaddy phpmyadmin. This is part of my __init__.py from flask import Flask from flask.ext.sqlalchemy import...
这里我用了SQLite数据库,只需要一个本地文件,而不用安装MySQL数据库。我们在config.py中增加配置如下: import os basedir = os.path.abspath(os.path.dirname(__file__)) class Config(object): # ... SQLALCHEMY_DATABASE_URI = os.environ.get('DATABASE_URL') or \ 'sqlite:///' + os.path.join...