soldQtByArticle method
Implementation
double soldQtByArticle(
String articleName, DateTime startOfMonth, DateTime endOfMonth) {
double qty = 0;
if (ticketType == TicketType.sell ||
ticketType == TicketType.sellDeferred) {
if (date.isAfter(startOfMonth) && date.isBefore(endOfMonth)) {
for (var item in items) {
if (item.article.designation == articleName) {
qty += item.quantity;
}
}
}
}
return qty;
}