Gorm batch update question.

[Sidneyxt]

I can use this code to realize update for " update set amount = amount -1 where id = 1"

tx.Table(dao.TInvoiceExpense).Where("id = ?",1).Updates(map[string]interface{}{ "amount": gorm.Expr("amount - ?", 1)})

how to realize batch update for "update set amount = amount -1 where id = 1; update set amount = amount -2 where id = 2; "
call mysql once.

[Sidneyxt]

@jinzhu help for gorm batch update