Returning a collection of view models would work: @ViewModel // or @DomainObject(nature = Nature.VIEW_MODEL) public class UserCount {
public UserCount(final LocalDate date, final BigInteger count) { this.date = date; this.count = count; } @Getter @Setter // Uses Lombok to generate getter and setters private LocalDate date; @Getter @Setter private BigInteger count; } HTH On 17 November 2016 at 17:32, Aída Betzabeth Dávila Sotelo < aida.dav...@vortech-it.com> wrote: > Hi! > > I have the following issue. I need to do a count of registered users per > day in my application. > I have the correct query, but I cannot display the results on screen. > > I tried with different types of data, at the end I put a simple list of > string but sends me the following error, instead of information: > > ??? EntityModel objectAdapter oid: null > > Could you recommend me another way that I can solve > this problem? or how could I get the count of some object by date?. > > Thanks in advance. > Aida Davila > > This is my code: > > > > public List<String> FindNewUsersCountPerDay() { > > System.out.println("Find"); > List <User> MyUsers = this.findAllUsers(); > > List<String> lista = new ArrayList<String>(); > > Map<String, Long> countByDate = MyUsers.stream() > .collect(Collectors > .groupingBy(User::getCreationDate, > Collectors.counting()) > ); > > Set<Map.Entry<String, Long>> set = countByDate.entrySet(); > List<Map.Entry<String, Long>> userList = new ArrayList<>(set); > Iterator<Map.Entry<String, Long>> it = userList.iterator(); > > int index = 0; > > while (it.hasNext()) { > Map.Entry<String, Long> entry = it.next(); > String result = index + " " + entry.getKey() + " " + > entry.getValue(); > lista.add(result); > System.out.println("Entry from converted list : " + index + " 1:" > + entry.getKey() + " 2:" + entry.getValue()); > index++; > } > > System.out.println(countByDate); > > return (lista); > } > >