How to obtain the records of a group in a Group Table?

Support
#1

Hello everyone, I have a Group Table and I would do:

  1. I have a button that when pressed I check if I have selected a record of the table.
  2. If selected I would like to get through the group to which it belongs
  3. When I have the group I would like to get all the records in the table belonging to that group
    How could I do ?, by the datasource or by Group Table?
    Greetings and thanks.
Could getChildren() in HierarchicalDatasource be recursive?
#2

Hi Jose,

For now API of GroupTable and GroupDatasource does not have a method to obtain groups of item, but you can iterate GroupDatasource groups and find what group contains the item.

Example:


// Helper method to iterate all nested groups
public static <T extends Entity> GroupInfo findGroup(GroupDatasource<? extends Entity, ?> groupDs,
                                                     List<GroupInfo> groups, T item) {
    for (GroupInfo group : groups) {
        List<GroupInfo> children = groupDs.getChildren(group);
        GroupInfo groupInfo = findGroup(groupDs, children, item);
        if (groupInfo != null) {
            return groupInfo;
        }

        if (groupDs.getGroupItemIds(group).contains(item.getId())) {
            return group;
        }
    }

    return null;
}

public void buttonClick() {
    User user = usersTable.getSingleSelected();

    GroupInfo group = findGroup(usersDs, usersDs.rootGroups(), user);
    if (group != null) {
        // get all items of group
        Collection<UUID> groupItemIds = usersDs.getGroupItemIds(group);
        List<User> groupUsers = groupItemIds.stream()
                .map(id -> usersDs.getItem(id))
                .collect(Collectors.toList());

        showNotification("Group size: " + groupUsers.size(), NotificationType.HUMANIZED);
    }
}

And thank you for your question, we are planning to improve API of GroupDatasource in one of the next minor releases.

#3

Yuriy, excellent response.
Thanks and regards.

#4

Hi.

Let me announce, that API of GroupTable and GroupDatasource is changed in the platform version 6.3.0.