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                #U: Update (Modify) 更新數據 我們復習下新增數據的步驟: add action -> 用戶填寫數據 -> 提交到insert action -> insert action處理數據。 更新數據,由于首先要知道用戶想更新哪條記錄,所以步驟更加麻煩一些: edit action -> 從數據庫中抓取用戶想更新的數據 -> 將數據傳給V層 -> 用戶修改數據 -> 提交到update action -> update action 處理數據。 下面,我們分別就以下六個方面進行講解。 1. 讀取數據 2. 展示數據 3. 修改數據 4. 傳遞數據 5. 接收數據 6. 更新數據
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