Group task which property is array

Gantt
#1

I want to group tasks with an array property, like this sample https://docs.dhtmlx.com/gantt/samples/02_extensions/28_tasks_grouping_relation_properties.html,

the simple code like this:

gantt.parse({
  data: [
    {
      id: 6,
      text: "Air conditioners check",
      type: "task",
      start_date: "03-04-2019 00:00",
      duration: 7,
      parent: "2",
      progress: 0.6,
      material: [{ resource_id: "7", value: 1 }],
      priority: 2,
      owner: ["2", "3"],
    },
  ],
});

gantt.serverList("owner", [
  { key: 1, label: "Ilona" },
  { key: 2, label: "John" },
  { key: 3, label: "Mike" },
  { key: 4, label: "Anna" },
  { key: 5, label: "Bill" },
  { key: 6, label: "Floe" },
]);
gantt.groupBy({
  groups: gantt.serverList('owner'),
  relation_property: 'owner',
  group_id: "key",
  group_text: "label",
  default_group_label: "Unassigned",
});

In the sample , it just generates a new group named ‘John,Mike’. But in my case , I hope it will be divided into two groups , the names are ‘John’ and ‘Mike’ . My scheme is to copy several new tasks during grouping and delete the copied tasks at the end of grouping. Is there a simpler way? thanks.

#2

Hello Kangkai,
Gantt doesn’t have that feature. The dev team will add it in the future, but I cannot give you any ETA.
For now, you need to manually implement a custom solution by using the Gantt API and Javascript:
https://snippet.dhtmlx.com/5/a0bd7f367