网站搭建笔记精简版---廖雪峰WebApp实战-Day4:编写Model笔记

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
廖雪峰的官方网站
网站搭建笔记精简版—廖雪峰WebApp实战-Day3:编写ORM笔记