由于bulk_insert_mappings在 SQLAlchemy 的异步版本中可能不直接支持,你可以使用add_all方法来批量添加对象。 asyncdefsave_import(self, data: List[DtoType], db: AsyncSession) ->bool:"""批量导入对象"""try:#将 DTO 转换为模型实例db_objs = [self.model(**obj_in.model_dump())forobj_inindata]#...
建立数据库连接,根据连接初始化Session的参数,然后创建session对象,用session来进行数据记录的插入,最后提交此次操作: fromsqlalchemyimportcreate_enginefromsqlalchemyimportColumnfromsqlalchemyimportInteger, String, DateTimefromsqlalchemy.ext.declarativeimportdeclarative_basefromsqlalchemy.ormimportsessionmakerimportpandas a...
/usr/bin/env python# -*- coding:utf-8 -*-import timeimport threadingfrom sqlalchemy.ext.declarative import declarative_basefrom sqlalchemy import Column, Integer, String, ForeignKey, UniqueConstraint, Indexfrom sqlalchemy.orm import sessionmaker, relationshipfrom sqlalchemy import create_enginefrom sq...
from sqlalchemy import create_engine from sqlalchemy.orm import sessionmaker from models import Book # 第一步:生成engine对象 engine = create_engine( "mysql+pymysql://root@127.0.0.1:3306/aaa", max_overflow=0, # 超过连接池大小外最多创建的连接 pool_size=5, # 连接池大小 pool_timeout=30, ...
from sqlalchemy.orm import sessionmaker from sqlalchemy import Column, Integer, String, ForeignKey, Float mysql_conn_url = "mysql+pymysql://root:a123456!@localhost:10306/study" engine = create_engine(mysql_conn_url) OrmBase = declarative_base() # orm base object ...
定义个session会话对象,使用 sessionmaker初始化一个类对象 from sqlalchemy.orm import sessionmaker Session = sessionmaker(engine) session = Session() 3.新建模型 新建一个user模型 新建user_module.py文件 from datetime import datetime from sqlalchemy import Column,Integer,String,DateTime,Boolean ...
session.add_all() < bulk_save_object() < bulk_insert_mappings() < SQLAlchemy_core() 查 查询是最常用的一个操作了,举个最简单的查询例子: users = session.query(Users).filter_by(id=1).all() for item in users: print(item.name) 通常我们通过以上查询模式获取数据,需要注意的是,通过session....
查询操作使用session.query()方法,迭代查询; from sqlalchemy import create_engine from sqlalchemy.ext.declarative import declarative_base from sqlalchemy import Column, Integer, String from sqlalchemy.orm import sessionmaker Base = declarative_base() class Teacher(Base): __tablename__ = 'teacher' id...
/usr/bin/python # -*- coding: utf-8 -*- from flask import Flask from flask_sqlalchemy import SQLAlchemy app = Flask(__name__) # 设置连接数据库的URL app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:password@127.0.0.1:3306/test' # 设置每次请求结束后会自动提交数据库的改动 app...