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
黑码哥8 分钟前
ViewHolder设计模式深度剖析：iOS开发者掌握Android列表性能优化的实战指南
android·ios·性能优化·跨平台开发·viewholder
若鱼191910 分钟前
SpringBoot4.0新特性-Observability让生产环境更易于观测
java·spring
亓才孓19 分钟前
[JDBC]元数据
android
觉醒大王19 分钟前
强女思维：着急，是贪欲外显的相。
java·论文阅读·笔记·深度学习·学习·自然语言处理·学习方法
亓才孓27 分钟前
[Class类的应用]反射的理解
开发语言·python
努力学编程呀(๑•ี_เ•ี๑)27 分钟前
【在 IntelliJ IDEA 中切换项目 JDK 版本】
java·开发语言·intellij-idea
独行soc30 分钟前
2026年渗透测试面试题总结-17（题目+回答）
android·网络·安全·web安全·渗透测试·安全狮
小镇敲码人36 分钟前
深入剖析华为CANN框架下的Ops-CV仓库：从入门到实战指南
c++·python·华为·cann
码农小卡拉37 分钟前
深入解析Spring Boot文件加载顺序与加载方式
java·数据库·spring boot
金融RPA机器人丨实在智能39 分钟前
Android Studio开发App项目进入AI深水区：实在智能Agent引领无代码交互革命
android·人工智能·ai·android studio
热门推荐
01GitHub 镜像站点02Claude Code + GLM4.7 避坑指南：解决 Unable to connect to Anthropic services03使用 1panel面板 部署 php网站04Vue-skills的中文文档05OpenClaw Chrome扩展使用教程 - 浏览器中继控制06让 Trae IDE 智能体 “读懂”文档 Excel+PDF+DOCX ：mcp-documents-reader 工具使用指南07从零搭建一个 PHP 登录注册系统（含完整源码）08UV安装并设置国内源09Linux下V2Ray安装配置指南10一文了解国产算子编程语言 TileLang，TileLang 对国产开源生态的影响与启示