pysqlite:///db_demo.sqlite" # mysql db_url = "mysql+pymysql://username:password@127.0.0.1:3306/db_name" # postgresql db_url = "postgresql://username:password@127.0.0.1:5432/db_name" # 创建引擎 engine = create_eng
fromsqlmodelimportSQLModel, create_engine# 内存db_url ="sqlite+pysqlite:///:memory:"# sqlitedb_url ="sqlite+pysqlite:///db_demo.sqlite"# mysqldb_url ="mysql+pymysql://username:password@127.0.0.1:3306/db_name"# postgresqldb_url ="postgresql://username:password@127.0.0.1:5432/db_name"# ...
pip install sqlmodel # mysql驱动 pip install pymysql # postgresql驱动 pip install psycopg2-binary 连接引擎 from sqlmodel import SQLModel, create_engine # 内存 db_url = "sqlite+pysqlite:///:memory:" # sqlite db_url = "sqlite+pysqlite:///db_demo.sqlite" # mysql db_url = "mysql+pymysql...
SQLite (内置,无需额外安装) PostgreSQL:cmd pip install psycopg2-binary MySQL:cmd pip install pymysql 安装完成后输入pip list检查 3. 验证安装 创建main.py测试文件: fromfastapiimportFastAPIfromsqlmodelimportSQLModel,Field,create_engine,Session,selectfromdatetimeimportdatetimeapp=FastAPI()# 数据库模型classUs...
from sqlmodel import SQLModel, Field, create_engine, Session class User(SQLModel, table=True): id: int = Field(default=None, primary_key=True) name: str email: str age: int address: str 如果我们想要创建一个新的模型UserSummary,只包含id,name, 和email字段,可以这样做: ...
fromsqlalchemyimportcreate_engine,Column,BigInteger,Stringfromsqlalchemy.ext.declarativeimportdeclarative_basefromsqlalchemy.ormimportsessionmakerbase= declarative_base()engine= create_engine("postgresql://postgresadmin:admin123@192.168.214.133:32222/postgresdb")classTest(base): ...
Create a Session¶Up to now, we have only used the engine to interact with the database.The engine is that single object that we share with all the code, and that is in charge of communicating with the database, handling the connections (when using a server database like PostgreSQL or...
from sqlmodel import Field, SQLModel, create_engine, Session, select from sqlalchemy.ext.asyncio import AsyncSession, async_scoped_session from sqlalchemy.dialects.postgresql import UUID import asyncio import databases DATABASE_URL = "postgresql+asyncpg://user:password@localhost/test" database = data...
SQLAlchemy是一个用于Python的SQL工具和对象关系映射(ORM)库。它允许开发者通过Python代码而不是SQL查询语言来操作数据库。SQLAlchemy提供了一种灵活且强大的方式来与关系型数据库交互,支持多种数据库后端,如PostgreSQL、MySQL、SQLite 本文使用的SQLAlchemy版本: 1.4.51 ...
POSTGRESQL,等同于PIPES_AS_CONCAT, ANSI_QUOTES, IGNORE_SPACE, NO_KEY_OPTIONS, NO_TABLE_OPTIONS, NO_FIELD_OPTIONS。 TRADITIONAL,等同于STRICT_TRANS_TABLES, STRICT_ALL_TABLES, NO_ZERO_IN_DATE, NO_ZERO_DATE, ERROR_FOR_DIVISION_BY_ZERO, NO_AUTO_CREATE_USER, and NO_ENGINE_SUBSTITUTION。