Limit number of records in a table

Support
#1

Hi there,

I’m wondering if there’s a way to limit the number of records that can be created in a table. What i want to do is this: Say i limit the number of records to 10. When the 10th record is created i want to show a notification, at that same moment i want to disable the create button, so no record can be created. Of course when a record or records are deleted, the create button must be enabled. I’m using legacy screens in cuba 7.

Is the possible?

Regards,

LS

#2

Hello!

The table is bounded with collection datasource, so you should track changes (add, remove, refresh) there. For instance:

@Named("ordersTable.create")
private CreateAction ordersTableCreate;
@Inject
private GroupDatasource<Order, UUID> ordersDs;

@Override
protected void init(InitEvent initEvent) {
    ordersDs.addCollectionChangeListener(e -> {
        boolean createEnabled = ordersDs.getItems().size() < 10;
        ordersTableCreate.setEnabled(createEnabled);
        if (!createEnabled) {
            showNotification("Records limit is 10");
        }
    });
}
#3

Thanks Roman, this works perfect.