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今天的内容比较简单，即基于昨天编写的ORM，将构建webapp需要用的三个表User、blog和commit使用model表示出来。

import time, uuid# 导入ORM模块的Model和五种主要存储类型from orm import Model, StringField, BooleanField, FloatField, TextField# 使用时间与伪随机数生成返回值def next_id():    return '%015d%s000' % (int(time.time() * 1000), uuid.uuid4().hex)# 定义ORM所有映射的基类：Model# Model类的任意子类可以映射一个数据库表# Model类可以看做是对所有数据库表操作的基本定义的映射# 继承自Model表示实现数据库操作的所有方法，定义为class方法，所有继承自model都具有数据库操作方法class User(Model):    __table__ = 'users'    id = StringField(primary_key=True, default=next_id, ddl='varchar(50)')    email = StringField(ddl='varchar(50)')    passwd = StringField(ddl='varchar(50)')    admin = BooleanField()    name = StringField(ddl='varchar(50)')    image = StringField(ddl='varchar(500)')    created_at = FloatField(default=time.time)class Blog(Model):    __table__ = 'blogs'    id = StringField(primary_key=True, default=next_id, ddl='varchar(50)')    user_id = StringField(ddl='varchar(50)')    user_name = StringField(ddl='varchar(50)')    user_image = StringField(ddl='varchar(500)')    name = StringField(ddl='varchar(50)')    summary = StringField(ddl='varchar(200)')    content = TextField()    created_at = FloatField(default=time.time)class Comment(Model):    __table__ = 'comments'    id = StringField(primary_key=True, default=next_id, ddl='varchar(50)')    blog_id = StringField(ddl='varchar(50)')    user_id = StringField(ddl='varchar(50)')    user_name = StringField(ddl='varchar(50)')    user_image = StringField(ddl='varchar(500)')    content = TextField()    created_at = FloatField(default=time.time)

参考博客

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