Python ORM 框架 SQLModel 快速入门教程

Python私教2024-09-20 16:56

创建模型

python 复制代码 
import sqlmodel
import typing


class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None

创建表

python 复制代码 
import sqlmodel
import typing



class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None

db_url = "mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlmodel?charset=utf8mb4"
engine = sqlmodel.create_engine(db_url, echo=True)

sqlmodel.SQLModel.metadata.drop_all(engine)
sqlmodel.SQLModel.metadata.create_all(engine)

添加单条数据

python 复制代码 
from tkinter.font import names

import sqlmodel
import typing


class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None


db_url = "mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlmodel?charset=utf8mb4"
engine = sqlmodel.create_engine(db_url, echo=True)

sqlmodel.SQLModel.metadata.drop_all(engine)
sqlmodel.SQLModel.metadata.create_all(engine)

# add
with sqlmodel.Session(engine) as session:
    zs = Hero(name="张三", real_name="张三", age=33)
    session.add(zs)
    session.commit()

添加多条数据

python 复制代码 
from tkinter.font import names

import sqlmodel
import typing


class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None


db_url = "mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlmodel?charset=utf8mb4"
engine = sqlmodel.create_engine(db_url, echo=True)

sqlmodel.SQLModel.metadata.drop_all(engine)
sqlmodel.SQLModel.metadata.create_all(engine)

# add
with sqlmodel.Session(engine) as session:
    zs1 = Hero(name="张三1", real_name="张三", age=33)
    session.add(zs1)
    zs2 = Hero(name="张三2", real_name="张三", age=33)
    session.add(zs2)
    zs3 = Hero(name="张三3", real_name="张三", age=33)
    session.add(zs3)

    session.commit()

根据名称查询数据

python 复制代码 
from tkinter.font import names

import sqlmodel
import typing


class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None


db_url = "mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlmodel?charset=utf8mb4"
engine = sqlmodel.create_engine(db_url, echo=True)

sqlmodel.SQLModel.metadata.drop_all(engine)
sqlmodel.SQLModel.metadata.create_all(engine)

# add
with sqlmodel.Session(engine) as session:
    zs1 = Hero(name="张三1", real_name="张三", age=33)
    session.add(zs1)
    zs2 = Hero(name="张三2", real_name="张三", age=33)
    session.add(zs2)
    zs3 = Hero(name="张三3", real_name="张三", age=33)
    session.add(zs3)

    # 查找
    query = sqlmodel.select(Hero).where(Hero.name=="张三1")
    hero = session.exec(query).first()
    print(hero)

    session.commit()

查找所有数据

python 复制代码 
from tkinter.font import names

import sqlmodel
import typing


class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None


db_url = "mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlmodel?charset=utf8mb4"
engine = sqlmodel.create_engine(db_url, echo=True)

sqlmodel.SQLModel.metadata.drop_all(engine)
sqlmodel.SQLModel.metadata.create_all(engine)

# add
with sqlmodel.Session(engine) as session:
    zs1 = Hero(name="张三1", real_name="张三", age=33)
    session.add(zs1)
    zs2 = Hero(name="张三2", real_name="张三", age=33)
    session.add(zs2)
    zs3 = Hero(name="张三3", real_name="张三", age=33)
    session.add(zs3)

    # 查找
    query = sqlmodel.select(Hero)
    heros = session.exec(query)
    print(list(heros))

    session.commit()

and 查询

python 复制代码 
from tkinter.font import names

import sqlmodel
import typing


class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None


db_url = "mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlmodel?charset=utf8mb4"
engine = sqlmodel.create_engine(db_url, echo=True)

sqlmodel.SQLModel.metadata.drop_all(engine)
sqlmodel.SQLModel.metadata.create_all(engine)

# add
with sqlmodel.Session(engine) as session:
    zs1 = Hero(name="张三1", real_name="张三", age=33)
    session.add(zs1)
    zs2 = Hero(name="张三2", real_name="张三", age=33)
    session.add(zs2)
    zs3 = Hero(name="张三3", real_name="张三", age=33)
    session.add(zs3)

    # 查找
    query = sqlmodel.select(Hero).where(Hero.real_name=="张三", Hero.name=="张三3")
    hero = session.exec(query).first()
    print(hero)

    session.commit()

or 查询

python 复制代码 
import sqlmodel
import typing

class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None


db_url = "mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlmodel?charset=utf8mb4"
engine = sqlmodel.create_engine(db_url, echo=True)

sqlmodel.SQLModel.metadata.drop_all(engine)
sqlmodel.SQLModel.metadata.create_all(engine)

# add
with sqlmodel.Session(engine) as session:
    zs1 = Hero(name="张三1", real_name="张三", age=33)
    session.add(zs1)
    zs2 = Hero(name="张三2", real_name="张三", age=33)
    session.add(zs2)
    zs3 = Hero(name="张三3", real_name="张三", age=33)
    session.add(zs3)

    # 查找
    query = sqlmodel.select(Hero).where(sqlmodel.or_(
        Hero.name == "张三1",
        Hero.name == "张三2",
    ))
    heros = session.exec(query)
    print(list(heros))

    session.commit()

根据 ID 查询

python 复制代码 
import sqlmodel
import typing

class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None


db_url = "mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlmodel?charset=utf8mb4"
engine = sqlmodel.create_engine(db_url, echo=True)

sqlmodel.SQLModel.metadata.drop_all(engine)
sqlmodel.SQLModel.metadata.create_all(engine)

# add
with sqlmodel.Session(engine) as session:
    zs1 = Hero(name="张三1", real_name="张三", age=33)
    session.add(zs1)
    zs2 = Hero(name="张三2", real_name="张三", age=33)
    session.add(zs2)
    zs3 = Hero(name="张三3", real_name="张三", age=33)
    session.add(zs3)

    # 查找
    hero  =session.get(Hero, 1)
    print(hero)

    session.commit()

分页查询

python 复制代码 
import sqlmodel
import typing

class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None


db_url = "mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlmodel?charset=utf8mb4"
engine = sqlmodel.create_engine(db_url, echo=True)

sqlmodel.SQLModel.metadata.drop_all(engine)
sqlmodel.SQLModel.metadata.create_all(engine)

# add
with sqlmodel.Session(engine) as session:
    zs1 = Hero(name="张三1", real_name="张三", age=33)
    session.add(zs1)
    zs2 = Hero(name="张三2", real_name="张三", age=33)
    session.add(zs2)
    zs3 = Hero(name="张三3", real_name="张三", age=33)
    session.add(zs3)

    # 查找
    query = sqlmodel.select(Hero).offset(0).limit(2)
    heros = session.exec(query)
    print(list(heros))

    session.commit()

修改数据

python 复制代码 
import sqlmodel
import typing


class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None


db_url = "mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlmodel?charset=utf8mb4"
engine = sqlmodel.create_engine(db_url, echo=True)

sqlmodel.SQLModel.metadata.drop_all(engine)
sqlmodel.SQLModel.metadata.create_all(engine)

# add
with sqlmodel.Session(engine) as session:
    zs1 = Hero(name="张三1", real_name="张三", age=33)
    session.add(zs1)
    zs2 = Hero(name="张三2", real_name="张三", age=33)
    session.add(zs2)
    zs3 = Hero(name="张三3", real_name="张三", age=33)
    session.add(zs3)

    # 修改
    hero = session.get(Hero, 1)
    hero.name = "李四"
    session.commit()

with sqlmodel.Session(engine) as session:
    # 修改
    hero = session.get(Hero, 1)
    hero.name = "李四"
    session.commit()
    session.refresh(hero)

删除数据

python 复制代码 
import sqlmodel
import typing



class Hero(sqlmodel.SQLModel, table=True):
    id: typing.Optional[int] = sqlmodel.Field(default=None, primary_key=True)
    name: str
    real_name: str
    age: typing.Optional[int] = None


db_url = "mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlmodel?charset=utf8mb4"
engine = sqlmodel.create_engine(db_url, echo=True)

sqlmodel.SQLModel.metadata.drop_all(engine)
sqlmodel.SQLModel.metadata.create_all(engine)

# add
with sqlmodel.Session(engine) as session:
    zs1 = Hero(name="张三1", real_name="张三", age=33)
    session.add(zs1)
    zs2 = Hero(name="张三2", real_name="张三", age=33)
    session.add(zs2)
    zs3 = Hero(name="张三3", real_name="张三", age=33)
    session.add(zs3)

    # 修改
    hero = session.get(Hero, 1)
    hero.name = "李四"
    session.commit()

with sqlmodel.Session(engine) as session:
    # 删除
    hero = session.get(Hero, 1)
    session.delete(hero)
    session.commit()
相关推荐
梦想画家2 小时前
SQLMesh Python 模型入门（二）：依赖管理、引擎实战与内存优化
数据库·python·sqlmesh
anew___3 小时前
《从零手写操作系统 (20)：ELF加载器——让OS读懂现代编译器》
java·服务器·前端
code2cat3 小时前
【随笔】MCP资源更新订阅：通知到达以后，Agent怎样刷新旧资料
java·后端·开发工具·ai agent·mcp
全栈练习生3 小时前
大模型原理之 KV Cache
python·ai
天赐范式3 小时前
天赐范式第183天：让选择开始生效——育种者方程与选择生效条件
python·数字生命·天赐范式·动态运行时·育种者方程·选择压力·遗传力
benchmark_cc3 小时前
批量行情返回后，怎样把请求失败的股票和正常数据分开？
python·数据分析·pandas·量化交易·股票数据·quantdash
一只旭宝3 小时前
C++ 后端开发面试题整理
java·c++·面试
sunshine22 girl4 小时前
Java学习五 面向对象高级5 内部类3-静态内部类和局部内部类（了解）
java·学习
en.en..4 小时前
Linux 进程退出exit(函数)
java·开发语言·算法
李游Leo4 小时前
HarmonyOS 7 TaskPool + Node-API + zstd：Native 批量压缩任务的主线程隔离、进度回传与资源收口【鸿蒙心迹】
java·华为·harmonyos
热门推荐
01历年考研数学一、数学二、数学三真题试卷及答案PDF02国内可直接用、免费额度/永久免费的大模型API清单（含 SiliconFlow、火山、阿里、智谱、百度、Kimi、DeepSeek、DMXAPI 等）03Telegram APK 下载安装完整指南 — 2026年最新04GitHub 镜像站点05如何新建文件夹？ 电脑新建文件夹的4种方法06蜘蛛磁力 搜索引擎大全，如何使用蜘蛛磁力查找磁力链接07微信历史版本含下载地址（ Windows PC | 安卓 | MAC ）及设置微信不更新082026 爱知・名古屋亚运会怎么看？直播平台+赛程安排分享09Windows 10/11 如何退出微软账户并改用本地账户登录（含找不到选项的解决方法）10给AI一张“业务概念地图“：本体如何从哲学走向企业智能