Holon-Platform Vaadin Flow API

General
1

Hi,

Is anyone using Holod Platform Vaadin Flow API (https://docs.holon-platform.com/current/reference/holon-vaadin-flow.html) ?

I’m looking for some examples on the usage of datasource lazy loading? I’m using below code to get unique values of Product → Category but am getting duplicates. Somewhere the problem is in filtering I believe. Please help

DataProvider.fromFilteringCallbacks(query -> {
                    return datastore.query(Product.TARGET)
                            .restrict(query.getLimit(), query.getOffset())
                            .stream(Product.PROPERTY_SET)
                            .distinct()
                            .filter(pb -> {
                                String filter = query.getFilter().orElse(null);
                                return StringUtils.containsIgnoreCase(pb.getValue(Product.CATEGORY), filter);
                            })

                            ;
                }, query -> {

                    return (int) datastore.query(Product.TARGET)

                            .stream(Product.PROPERTY_SET)
                            .distinct()
                            .filter(pb -> {
                                String filter = query.getFilter().orElse(null);
                                return StringUtils.containsIgnoreCase(pb.getValue(Product.CATEGORY), filter);
                            })
                            .count();
                }))