SQLAlchemy 是一个强大的 Python SQL 工具包和 ORM(对象关系映射)库,它允许开发者高效地与数据库进行交互。使用 `DATABASE_URL` 连接到数据库是 SQLAlchem...
问使用sqlalchemy使用DATABASE_URL连接到数据库ENSQLAlchemy是Python编程语言下的一款开源软件。提供了SQL工...
from sqlalchemy import Column,Integer,String HOSTNAME = '127.0.0.1' DATABASE = 'class_database' PORT = 3306 USERNAME = 'root' PASSWORD = 'root' DB_URL = 'mysql+pymysql://{}:{}@{}:{}/{}'.format(USERNAME,PASSWORD,HOSTNAME,PORT,DATABASE) engine = create_engine(DB_URL) Base = de...
database: 要连接的数据库名称 pymysql模块是较长用于连接mysql的模块,使用pymysql的连接的语句为: mysql+pymysql://dahl:123456@10.0.0.13:3306/test 创建引擎用于进行数据库的连接:create_engine(urls) importsqlalchemy db_url ='mysql+pymysql://dahl:123456@10.0.0.13:3306/test'engine = sqlalchemy.create...
DB_URL = "mysql+pymysql://{}:{}@{}/{}".format(USERNAME,PASSWORD,HOSTNAME,DATABASE) # 创建引擎 engine = create_engine(DB_URL,encoding='utf8') #创建连接 with engine.connect() as con: rs = con.execute('SELECT 1') print rs.fetchone() ...
charset=utf8".format( username=USERNAME, password=PASSWORD, host=HOSTNAME, port=PORT, db=DATABASE, ) engine=create_engine(DB_URL) Base= declarative_base(engine) 第二步:用Base作为基类来定义自己的ORM类,首先定义__tablename__ = 'person'指定数据库表名。
['SQLALCHEMY_DATABASE_URI']=db_uri app.config['SQLALCHEMY_TRACK_MODIFICATIONS']=False# 创建数据库实例db=SQLAlchemy(app)# 用来访问数据库# engine = db.get_engine()# 定义数据模型classAlarmEvent(db.Model):__tablename__='alarm_event'id=db.Column(db.Integer,primary_key=True,autoincrement=...
charset=utf8".format(DIALECT,DRIVER,USERNAME,PASSWORD,HOST,PORT,DATABASE)SQLALCHEMY_TRACK_MODIFICATIONS=False 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 2.2 SQLAlchemy 数据库数据表字段设置; """ 创建数据表和数据字段设置...
['SECRET_KEY'] = 'hard to guess'# url的格式为,数据库的协议://用户名:密码@ip地址:端口号(默认可以不写)/数据库名app.config["SQLALCHEMY_DATABASE_URI"] = 'mysql://{username}:{password}@{host}:{port}/{database}'.format(**db_config)# 动态追踪数据库的修改app.config["SQLALCHEMY_TRACK...
With the above application you can create the database or enable migrations if the database already exists with the following command: $ flask db init Note that theFLASK_APPenvironment variable must be set according to the Flask documentation for this command to work. This will add amigrations...