今天的內容比較簡單，即基於昨天編寫的ORM，將構建webapp需要用的三個表User、blog和commit使用model表示出來。

import time, uuid
# 匯入ORM模組的Model和五種主要儲存型別
from orm import Model, StringField, BooleanField, FloatField, TextField

# 使用時間與偽隨機數生成返回值
def next_id():
    return '%015d%s000' % (int(time.time() * 1000), uuid.uuid4().hex)

# 定義ORM所有對映的基類：Model
# Model類的任意子類可以對映一個數據庫表
# Model類可以看做是對所有資料庫表操作的基本定義的對映
# 繼承自Model表示實現資料庫操作的所有方法，定義為class方法，所有繼承自model都具有資料庫操作方法
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)
 

參考部落格
廖雪峰的官方網站
網站搭建筆記精簡版—廖雪峰WebApp實戰-Day3:編寫ORM筆記