替換

原創 qq_26535453 2018-09-04 02:07

圖片替換：1種是刪除原來的圖片記錄，重新成生一條新的。

2.在原記錄上更新 某些字段


替換的話不僅要能替換掉圖片，還要替換掉掉圖片的屬性，比如是否是封面啦，和作爲封面是否也要同步更新到其它相應字段去。

本身+屬性+別處引用

舉例：本身：實質內容是否被替換

           屬性：當前相冊封面、總相冊封面

         別處引用：記錄直接有封面路徑字段，需要同步更新。

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