sqlacodegen

这个工具可以把数据库的表转成sqlalchemy用的class。

但是 table必须要有主键。否则转化成的是Table类型而不是class 

root@rijx:/tmp# sqlacodegen --schema rdb  mysql://root:passw0rd@localhost:3306
# coding: utf-8
from sqlalchemy import Column, Integer, String, Table
from sqlalchemy.ext.declarative import declarative_base


Base = declarative_base()
metadata = Base.metadata


t_mgr = Table(
    'mgr', metadata,
    Column('id', Integer, nullable=False),
    Column('name', String(18)),
    schema='rdb'
)


class T1(Base):
    __tablename__ = 't1'
    __table_args__ = {u'schema': 'rdb'}

    id = Column(Integer, primary_key=True)
    val = Column(String(8))


t_t2 = Table(
    't2', metadata,
    Column('id', Integer, nullable=False),
    Column('val', String(8)),
    schema='rdb'
)


class User(Base):
    __tablename__ = 'user'
    __table_args__ = {u'schema': 'rdb'}

    user_id = Column(Integer, primary_key=True)
    user_name = Column(String(40))
    password = Column(String(10))