By default invoice line item is editable in tree view,but i have customized to form view.Now what am i facing is, in the form view i can able save the invoice line without giving account field,but account_id field is mandatory, how it is possible????
But when i save invoice form it shows integrity error because i didnt give account field which is mandatory.
can anyone explain ????
Then i need to pop up the error while saving invoice line item itself