"""fromsqlalchemy.ext.asyncioimportcreate_async_enginefromsqlalchemy.engineimportURL# 也可以直接传递一个字符串,参数和 create_engine 是一样的# create_async_engine("mysql+asyncmy://...")mysql_engine = create_async_engine( URL.create("mysql+asyncmy", username="root", password="123456", host=...
fromsqlalchemyimportColumn, Integer, String, ForeignKeyfromsqlalchemy.ormimportrelationship, declarative_basefromsqlalchemy.ext.asyncioimportcreate_async_engine, AsyncSessionfromsqlalchemy.ormimportsessionmaker Base=declarative_base()classDictTypeInfo(Base):__tablename__='dict_type_info'id= Column(Integer, ...
""" 使用 create_engine 创建同步引擎使用 create_async_engine 创建异步引擎 同步引擎搭配同步驱动异步引擎搭配异步驱动 """ from sqlalchemy.ext.asyncio import create_async_engine from sqlalchemy.engine import URL # 也可以直接传递一个字符串,参数和 create_engine 是一样的 # create_async_engine("mysql+...
而异步的方式如下: fromsqlalchemy.ext.asyncioimportcreate_async_engine async_engine = create_async_engine(ASYNC_SQLALCHEMY_URI, pool_recycle=1500) 2、session的区别 我们一般用sessionmaker来建立session,不过异步的有点区别: fromsqlalchemy.ext.asyncioimportAsyncSessionfromsqlalchemy.ormimportsessionmaker# 同...
from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession from sqlalchemy.orm import sessionmaker Base = declarative_base() class DictTypeInfo(Base): __tablename__ = 'dict_type_info' id = Column(Integer, primary_key=True, index=True) ...
from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession from sqlalchemy.orm import sessionmaker # 创建异步引擎 engine = create_async_engine('数据库连接字符串') # 创建异步会话工厂 async_session = sessionmaker(engine, class_=AsyncSession) 添加多对多关系:在创建用户和角色实例后,可以通...
"""使用 create_engine 创建同步引擎使用 create_async_engine 创建异步引擎同步引擎搭配同步驱动异步引擎搭配异步驱动"""from sqlalchemy.ext.asyncio import create_async_enginefrom sqlalchemy.engine import URL# 也可以直接传递一个字符串# 参数和 create_engine 是一样的# create_async_engine("mysql+asyncmy:...
1. 安装依赖:pip install sqlalchemy sqlalchemy-asyncio 2. 在 Flask 应用中初始化 SQLAlchemy 和 Asyncio: from flask import Flask from flask_sqlalchemy import SQLAlchemy import sqlalchemy.ext.asyncio app = Flask(__name__) app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///example.db' ...
sqlalchemy.ext.asyncio import AsyncSession from sqlalchemy.ext.asyncio import create_async_engine from sqlalchemy.orm import DeclarativeBase from sqlalchemy.orm import Mapped from sqlalchemy.orm import mapped_column from sqlalchemy.orm import relationship from sqlalchemy.orm import selectinload class ...
sqlalchemy[asyncio]启用异步支持,性能提升300%93 数据库配置(database.py): fromsqlalchemy.ext.asyncioimportcreate_async_engine, AsyncSession fromsqlalchemy.ormimportsessionmaker, declarative_base # 异步引擎配置(连接池优化) ASYNC_DB_URL ="mysql+asyncmy://user:pass@localhost/db?charset=utf8mb4" engi...