Golang把時間和數字相乘報錯invalid operation: second * time.Second (mismatched types int and time.Duration)

在設置cookie過期時間的時候，用當日剩余秒數與內置變量相乘報錯invalid operation: second * time.Second (mismatched types int and time.Duration)

 

Expires : time.Now().Add(10 * time.Second),//正常數字相乘沒錯

Expire:=12345
Expires : time.Now().Add(Expire * time.Second), //表達式相乘報錯

Expire:=12345
Expires : time.Now().Add(time.Duration(Expire) * time.Second), //這樣寫就對了