Options parentPropety not working as expected

[immersivevreducation]

hi guys, he's the issue I'm facing using parentProperty options.

var data2 =[
{
id: 1,
created_at: '2020-05-09T16:13:04.896Z',
folder_id: 1,
'Filess.name': 'MyFirstLesson'
},
{
id: 2,
created_at: '2020-05-11T16:13:04.896Z',
folder_id: 2,
'Filess.name': 'MyFirstLesson'
},
{
id: 3,
created_at: '2020-05-11T16:13:04.896Z',
folder_id: 3,
'Filess.name': 'MyFirstLesson'
},
{
id: 4,
created_at: '2020-05-09T16:13:04.896Z',
folder_id: 1,
'Filess.name': 'Meeting1'
},
{
id: 5,
created_at: '2020-05-16T16:13:04.896Z',
folder_id: 1,
'Filess.name': 'SetupRoom'
},
{
id: 6,
created_at: '2020-05-17T16:13:04.896Z',
folder_id: 1,
'Filess.name': 'SetupRoom'
},
{
id: 7,
created_at: '2020-05-17T16:13:04.896Z',
folder_id: 1,
'Filess.name': 'SetupRoom'
},
{
id: 8,
created_at: '2020-05-20T15:26:36.656Z',
folder_id: 1,
'Filess.name': 'Annotation 2020-04-08 135240.jpg'
}
]

arrayToTree(data2, {parentProperty: 'folder_id})

returns empty array

[rcoundon]

I think this is because your top-level node is pointing to itself
i.e. it has id and folder_id both equal to 1

{ 
  id: 1,
  created_at: '2020-05-09T16:13:04.896Z',
  folder_id: 1,
  'Filess.name': 'MyFirstLesson'
},