網站搭建筆記精簡版---廖雪峰WebApp實戰-Day4:編寫Model筆記
阿新 • • 發佈:2018-11-07
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)