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          全面掌握Django ORM

          難度中級
          時長 1小時45分
          學習人數
          綜合評分9.5
          20人評價 查看評價
          9.7 內容實用
          9.1 簡潔易懂
          9.6 邏輯清晰
          簡介:Django的一個強大的功能是它的對象關系映射Object-Relational Mapping(ORM),它允許你就像使用 SQL一樣去和你的數據庫交互,本課程將以Django官方文檔為依據,通過開發講師、課程、學生、助教四個模型類,給大家完整透徹的講解Django ORM知識體系,為更高級的開發打下堅實基礎。課程源碼:https://github.com/liaogx/imooc

          第1章 第一章:課程介紹

          介紹本課程的學習內容和目標,如何學習本課程,引導學生對Django ORM有一個基礎且全面的了解,并能夠在課程結束后獨立使用Django完成ORM的開發。

          第2章 ORM介紹

          Django ORM介紹,模型類的概念、由來、優勢、劣勢。

          第3章 字段類型和參數。

          全面介紹Django ORM中所有的字段,詳解所有字段都有的公共參數和個別字段的私有參數,以“省-市-縣-村”為例,如何在一張表中實現自關聯存儲。

          第4章 元數據Meta

          講解元數據的概念,舉例常用的元數據,以慕課網為案例背景,演示”講課-助教-課程-學生“模型類的開發過程。

          第5章 Django數據表操作

          介紹migrations文件夾,django_migrations表的含義;Django ORM如何創建與更改數據表,如何導入導出數據。

          第6章 Models API

          查詢集QuerySet介紹,講解所有的Models API,實現一個自定義的聚合查詢功能group_concat。

          第7章 F對象與Q對象

          如何使用F對象操作字段的數據,使用Q對象實現復雜的查詢,結合AND, OR, NOT, |, ~, &操作。

          第8章 課程總結

          回顧課程內容與重難點,總結經驗、心得以及擴展建議。
          課程須知
          1、Python基礎知識 2、會Django開發環境搭建 3、MySQL的簡單使用
          老師告訴你能學到什么?
          1、什么是Django ORM 2、常用的字段和屬性有哪些 3、如何定義元數據Meta 4、Django數據表相關操作 5、Models API入門到精通,ORM無障礙操作MySQL 6、F對象和Q對象實現復雜的高級操作
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