AI代码解释 >sqlacodegen-husage:sqlacodegen[-h][--version][--schemaSCHEMA][--tablesTABLES][--noviews][--noindexes][--noconstraints][--nojoined][--noinflect][--noclasses][--nocomments][--outfileOUTFILE][url]Generates SQLAlchemy model code from an existing database.positional arguments:ur...
还有一种方法可以让模型代码跟数据库表字段关联起来,__table__中使用autoload = True 它会自动加载 model 的 Column, 使用这种方法时,在构建 model 之前,Base 类要与 engine 进行绑定. fromsqlalchemyimportcreate_enginefromsqlalchemy.ext.declarativeimportdeclarative_basefromsqlalchemy.sql.schemaimportTable engine ...
在创建数据库版本的时候添加--autogenerate参数,就会从Base.metadata元数据中生成脚本 $ alembic revision --autogenerate -m "add user table" 这时候会在生成升级代码 """add user table Revision ID: 97de1533584a Revises: 8678ab6d48c1 Create Date: 2016-09-19 21:58:00.758410 """ from alembic impo...
Generates SQLAlchemy model codefroman existing database. positional arguments: url SQLAlchemy url to the database optional arguments:-h, --help show this help messageandexit # 显示此帮助消息并退出--versionprintthe version numberandexit # 打印版本号并退出--schema SCHEMA load tablesfroman alternate...
class User(db.Model): __tablename__='user' id = db.Column(db.Integer, primary_key=True,autoincrement=True) email = db.Column(db.String(255)) enabled = db.Column(db.Boolean) username = db.Column(db.String(255), unique=True,nullable=False) ...
alembic revision --autogenerate -m "first commit" 1. (7)upgrade到数据库 alembic upgrade head 1. (8)添加字段 假入想添加一个字段age class User(db.Model): __tablename__ = 'user' id = db.Column(db.Integer,primary_key=True,autoincrement=True) ...
"""model的基类,所有model都必须继承""" id = Column(Integer, primary_key=True) created_at = Column(DateTime, nullable=False, default=datetime.datetime.now) updated_at = Column(DateTime, nullable=False, default=datetime.datetime.now, onupdate=datetime.datetime.now, index=True) ...
from myapp import mymodel # 假设你的模型在 myapp.mymodel 中 # 插入以下代码到 env.py 的 context.configure() 调用中 target_metadata = mymodel.Base.metadata 3. 创建数据库迁移脚本 使用Alembic 创建新的迁移脚本: bash alembic revision --autogenerate -m "描述你的迁移" 这将根据当前数据库结构与...
The code generators that generate classes try to generate model classes whenever possible. There are two circumstances in which aTableis generated instead: the table has no primary key constraint (which is required by SQLAlchemy for every model class) ...
SQLAlchemy反向⽣成model模型前⾔ Django 反向⽣成的 model 模型的命令： python manager.py inspectdb SQLAlchemy / Flask-SQLAlchemy则是： pip3 install sqlacodegen 使⽤⽅法如下 利⽤ sqlacodegen ⾃动⽣成ORM实体类 ..\Anaconda3\envs\py3\Scripts>.\sqlacodegen.exe --outfile project_...