How can I get parent guid of an item?

Question

I have a list with items in SharePoint Online. There many items and their structure look like a tree.

list/
    itemA/
    itemB/
          itemBa/
                 itemX
          itemBb/
                 itemY
          itemBc/
    itemC/

How can I get a parent guid of the itemX by REST or GraphAPI? (for example)

Actually, I have to get a hierarchy of items on the List. But SharePoint API provides children of a List, but not their hierarchy. Is it possible to get?

Answer 1

For Item-

_api/Web/Lists/getByTitle('MyList')/items(1)/ParentID

For Site-

_spPageContextInfo.webAbsoluteUrl/_api/web/parentweb?$select=Id

Answer 2

You can follow below steps to get the parent folder's GUID. You will require 2 calls to do so:

1. Use below REST API to access the actual item. In that you will have file directory reference. This will be used to access your parent folder of item. i.e.: itemX

   https://<site-url>/_api/web/lists/getbytitle('<list-title>')/items(<item-id>)?$select=ID,FileDirRef

In the output: you will have relative path of the parent folder. Use that path in 2nd step.

2. Create REST API to access GUID of the parent folder as below:

https://<site-url>/_api/web/getfolderbyserverrelativeurl('<pass the relative path of the parent folder>')/listitemallfields/GUID

output:

<d:GUID xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices" xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns:georss="http://www.georss.org/georss" xmlns:gml="http://www.opengis.net/gml" m:type="Edm.Guid">70870a3f-2f73-4ad9-b5ac-8eeba2d823b0</d:GUID>