FastAPI + tortoise-orm基础使用

更改sqlite为mysql

from tortoise import Tortoise
import asyncio
async def init():
    user = 'root'
    password = '123456'
    db_name = 'test'
    await Tortoise.init(
        #指定mysql信息
        db_url=f'mysql://{user}:{password}@127.0.0.1:3306/{db_name}',
        #指定models
        modules={'models': ['sanic_bp.models']}
    )
    #按照模型生成表
    # await Tortoise.generate_schemas()
    asyncio.run(init())

在sanic中使用：

from sanic import Sanic
from tortoise import Tortoise
 
app = Sanic(__name__)
 
@app.listener('after_server_start')
async def notify_server_started(app, loop):
    print('sanic sanic服务启动后建立mysql连接')
    #实例化mysql连接
    await Tortoise.init(
        db_url='mysql://root:123456@127.0.0.1:3306/test?maxsize=50&minsize=3',
        modules={'models': ['sanic_bp.models']}
    )

基础使用

 
from tortoise.contrib.sanic import register_tortoise
 
register_tortoise(
    app, db_url="sqlite://:memory:", modules={"models": ["models"]}, generate_schemas=True
)
 

sanic 和 fastapi中使用
tortoise-orm 连接多个库

async def run():
    await Tortoise.init(
        {    
            #这里面指定两个不同的数据库，虽然它填写的都是一样的
            "connections": {
                "first": {
                    "engine": "tortoise.backends.sqlite",
                    "credentials": {"file_path": "example.sqlite3"},
                },
                "second": {
                    "engine": "tortoise.backends.sqlite",
                    "credentials": {"file_path": "example1.sqlite3"},
                },
            },
            #可以指定多个不同的models, 嗯，它指定的也是一样的
            "apps": {
                "tournaments": {"models": ["__main__"], "default_connection": "first"},
                "events": {"models": ["__main__"], "default_connection": "second"},
            },
        }
    )
    #await Tortoise.generate_schemas()
    #选取数据库
    client = Tortoise.get_connection("first")
    #选取 models
    second_client = Tortoise.get_connection("second")
    #然后这下面就可以进行orm操作了

增删改查

from typing import List
from fastapi import APIRouter, HTTPException
from tortoise.contrib.fastapi import HTTPNotFoundError

from schemas.MaintainedData import MaintainedData_Pydantic, MaintainedDataIn_Pydantic
from models.MaintainedData import MaintainedData
from schemas.basic import Response404, Response200

data = APIRouter(tags=['数据模块'])


@data.get("/", summary="数据列表", response_model=List[MaintainedData_Pydantic])
async def data_list(order:str,limit: int = 10, page: int = 1):
    #  limit 是显示的条数 ，page是页数

    skip = (page - 1) * limit
    # select * from movie limit offset,limit
    # select * from movie limit 0,10
    return await MaintainedData_Pydantic.from_queryset(MaintainedData.all().offset(skip).limit(limit))


@data.post("/data", summary="新增数据", )
async def add_data(md_data: MaintainedData_Pydantic):
    movie_obj = await MaintainedData.create(**md_data.dict(exclude_unset=True))
    # movie_obj = await Movie.create(name="",year="",xx="")
    return await MaintainedData_Pydantic.from_tortoise_orm(movie_obj)


@data.put("/data/{data_id}", summary="编辑数据", responses={404: {"model": HTTPNotFoundError}})
async def update_data(site_id: str, md_data: MaintainedDataIn_Pydantic):
    updated_count = await MaintainedData.filter(site_id=site_id).update(**md_data.dict(exclude_unset=True))
    print(updated_count)
    if not updated_count:
        return Response404(msg=f"data {site_id} not found")
    return Response200(data=await MaintainedData_Pydantic.from_queryset_single(MaintainedData.get(site_id=site_id)))


@data.get("/data/{data_id}", summary="查找数据", response_model=MaintainedData_Pydantic,
          responses={404: {"model": HTTPNotFoundError}})
async def get_user(site_id: str):
    return await MaintainedData_Pydantic.from_queryset_single(MaintainedData.get(site_id=site_id))


@data.delete("/data/{data_id}", summary="删除数据", responses={404: {"model": HTTPNotFoundError}})
async def del_movie(site_id: str):
    deleted_count = await MaintainedData.filter(site_id=site_id).delete()
    if not deleted_count:
        raise HTTPException(status_code=404, detail=f"data {site_id} not found")
    return HTTPException(status_code=200, detail=f"Deleted Movie {site_id}")

models.py

from datetime import datetime
from typing import Optional, Iterable

from tortoise import fields, models, BaseDBAsyncClient


class MaintainedData(models.Model):
    """
    The User model
    """
    id = fields.SmallIntField(pk=True, index=True, description="ID", )
    site_id = fields.CharField(max_length=20, unique=True, description="网站ID")
    site_name = fields.CharField(max_length=128, null=False, description="网站名称")
    site_type = fields.CharField(max_length=16, null=False, description="网站类型")
    description = fields.CharField(max_length=255, default="",description="网站备注", )
    site_path_name = fields.CharField(max_length=128, null=True, description="目录名称")
    site_path_url = fields.CharField(max_length=128, null=True, description="目录链接")
    status = fields.CharField(max_length=128, null=True, description="脚本状态")
    run_computer = fields.CharField(max_length=255, null=True, description="运行电脑")
    run_directory = fields.CharField(max_length=255, null=True, description="运行目录")
    crawling_time :Optional[datetime]= fields.DatetimeField(auto_add=True, description="运行时间")
    err_message = fields.CharField(max_length=255, null=True, description="错误信息")

order by

db_Secc = MaintainedData.all().order_by("crawling_time")

Eum 枚举

class order_byEnum(str, Enum):
    pear = ""
    banana = '-'


@data.get("/", summary="数据列表", response_model=List[MaintainedData_Pydantic])
async def data_list(
        order_by: order_byEnum = "", 
        limit: int = 10, 
        page: int = 1):
    #  limit 是显示的条数 ，page是页数
    skip = (page - 1) * limit
    return await MaintainedData_Pydantic.from_queryset(MaintainedData.all().offset(
        skip).limit(
        limit).order_by(
        f"{order_by}crawling_time"))