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How to chanage value in Callback.Row register function?

LaoBan-ywcm opened this issue · comments

commented

How to chanage value in Callback.Row register function?

Some fields in my database are encrypted. When performing a query, I need to join multiple tables and use the scan method. I want to decrypt in plugins.

I register the callback like this: db.Callback().Row().After("gorm:row").Register("*", decryptRowValue).

In decryptRowValue, I want to modify the value of wallet_name, but modifying it this way does not work. How should I set it up?

func decryptRowValue(db *gorm.DB) {
	rows, err := db.Statement.ConnPool.QueryContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...)
	if err != nil {
		db.AddError(err)
		return
	}
	defer rows.Close()

	columns, err := rows.Columns()
	if err != nil {
		db.AddError(err)
		return
	}

	values := make([]interface{}, len(columns))
	valuePtrs := make([]interface{}, len(columns))
	for i := range values {
		valuePtrs[i] = &values[i]
	}

	if rows.Next() {
		if err = rows.Scan(valuePtrs...); err != nil {
			db.AddError(err)
			return
		}

		
		for i, col := range columns {
			if col == "wallet_name" {
				values[i] = "test"
			}

			fmt.Println(col, values[i])
		}
	}
}

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