python SQLAlchemy 学习

SQLAlchemy

from sqlalchemy import create_engine

# 连接数据库，并打印SQL
engin = create_engine("sqlite:///:memeory", ehco=True)
# 连接MYSQL
engine = create_engine("mysql://scott:tiger@hostname/dbname",
                            encoding='latin1', echo=True)

from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String

Base = declarative_base()

# 必须包含一个__tablename__和id主键属性
class User(Base):
	__tablename__ = 'users'

	id = Column(Integer, primary_key=True)
	name = Column(String)
	fullname = Column(String)
	nickname = Column(String)

    def __repr__(self):
	   return "<User(name='%s', fullname='%s', nickname='%s')>" % ( self.name, self.fullname, self.nickname)

Mini风格

from sqlalchemy.ext.declarative import declared_attr

class Base(object):
    @declared_attr
    def __tablename__(cls):
        return cls.__name__.lower()

    __table_args__ = {'mysql_engine': 'InnoDB'}

    id =  Column(Integer, primary_key=True)

from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base(cls=Base)

class MyModel(Base):
    name = Column(String(1000))

创建表

Base.metadata.create_all(engine)