在插入新数据时如果字段是 UNIQUE INDEX 并且已有同样的值，则会报 Duplicate Entry （mysql）错误。是否可以在 errors.go 文件里加一个变量用于表示这个错误？

文档里有 Upsert, OnConflict 相关的内容，但是我希望能得到 duplicate entry 错误类型，然后由我自己的 go 代码做一些额外的操作，例如清理/删除磁盘上的相关文件。 https://gorm.io/docs/create.html#Upsert-On-Conflict

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Comment From: Jimwi

在代码中怎么判断 Duplicate Entry error ？

Comment From: Heliner

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在代码中怎么判断 Duplicate Entry error ？ #5144

@Jimwi https://github.com/go-gorm/gorm/issues/5144#issuecomment-1065896567 this hava an temporarily solution , but i'm not sure ,this solution will cover all case.