"NAME": "sqlite.db" } DBURI = get_db_uri(DBINFO) # 生成环境 class ProductConfig: DEBUG = False TESTING = False SQLALCHEMY_TRACK_MODIFICATIONS = False DBINFO = { "ENGINE": "mysql", "DRIVER": "pymysql
# 更新单个对象user=User.query.filter_by(username='test').first()user.email='new_email@example....
# 导入:fromsqlalchemyimportColumn, String, create_enginefromsqlalchemy.ormimportsessionmakerfromsqlalchemy.ext.declarativeimportdeclarative_base# 创建对象的基类:Base = declarative_base()classUser(Base):'''用戶信息表'''__tablename__ ='users'id= Column(Integer, primary_key=True) username = Column(...
步骤1 - 安装Flask-SQLAlchemy扩展。 pip install flask-sqlalchemy 步骤2 - 您需要从此模块导入SQLAlchemy类。 from flask_sqlalchemy import SQLAlchemy 步骤3 - 现在创建一个Flask应用程序对象并为要使用的数据库设置URI。进行数据库链接操作 步骤4 - 然后使用应用程序对象作为参数创建SQLAlchemy类的对象。该对象包...
from sqlalchemy import or_,and_.not_ from xx import User # User是一个创建user表的类 1. 2. 3. 1、根据主键查询用户使用get(主键值),返回值是一个对象 user = User.query.get(1) # select * from user where id = 1 1. 2. 2、取所有 ...
u2= User(username='peter', email='peter@example.com', role_id=role2.id) db.session.add_all([u1, u2]) db.session.commit()#查询数据forrindb.session.query(Role).order_by(desc(Role.id)).all():print(r.name) u= User.query.filter_by(id=1).first()print(u) ...
pip install flask-sqlalchemy 配置SQLAlchemy app.py 文件代码: 实例 fromflaskimportFlask fromflask_sqlalchemyimportSQLAlchemy app=Flask(__name__) app.config['SQLALCHEMY_DATABASE_URI']='sqlite:///example.db'# 使用 SQLite 数据库 app.config['SQLALCHEMY_TRACK_MODIFICATIONS']=False ...
SQLAlchemy(app=None, *, metadata=None, session_options=None, query_class=Query, model_class=Model, engine_options=None, add_models_to_shell=True, disable_autonaming=False) Integrates SQLAlchemy with Flask. This handles setting up one or more engines, associating tables and models with specific...
Here is an example table and model (put this into models.py): from sqlalchemy import Table, Column, Integer, String from sqlalchemy.orm import mapper from yourapplication.database import metadata, db_session class User(object): query = db_session.query_property() def __init__(self, name...
new_user = User(name='John', email='john@example.com') db.session.add(new_user) db.session.commit() 查询(Read)在Flask中,我们可以使用SQLAlchemy的查询语法来查询数据。例如,我们查询所有用户: users = User.query.all() for user in users: print(user.name, user.email) 我们也可以使用条件查询...