Using Graph API to query SharePoint list items and expand user field

Question

I'm trying to query for some SP list items, all is working fine except I can't seem to expand a custom column of type Person.

I can see the createdBy and lastModifiedBy expanded and even includes the AAD user id, which is great and also leads me to think what I want is possible!

But mine is a custom column.

I'm running this and can only seem to get the SP user list id and the user's display name...neither of which are much use.

/items?expand=fields(select=UserLookupId,User)

Ideally I'd like to get the AAD user id as per createdBy and modifiedBy field, but the email would suffice.
Otherwise the only way I can see is to query the User Information List (using the UserLookupId ) to get the email?

Thanks

Answer 1

This appears to be correct assumption:

Otherwise the only way I can see is to query the User Information List (using the UserLookupId) to get the email?

for non-system user fields, it is indeed a way to go, but there are some distinctions whether user field is multi-valued or single-valued . If Approvers is a multi-valued user field, then the following query:

https://graph.microsoft.com/v1.0/sites/{site-id}/lists/{list-id}/items?$expand=fields($select=Approvers)

returns email and id properties along with displayName property for user field value.

While for single-valued user field only id (available via {userfield}LookupId property) and displayName properties could be requested via items endpoint , for example:

https://graph.microsoft.com/v1.0/sites/{site-id}/lists/{list-id}/items?$expand=fields($select=Approver,ApproverLookupId)

---

So, indeed User Information List needs to be utilized to request additional user properties, for example:

https://graph.microsoft.com/v1.0/sites/root/lists('User Information List')/items/{item-id}/?$expand=fields($select=Email)

where item-id corresponds to user field lookup id

Answer 2

This was my experience modifying the Build Angular single-page apps with Microsoft Graph . In the examples below, I changed my id's out with the default text.

Here is The Finished Project on thier github

In Graph Explorer , this worked . You can verify it at the Microsoft Graph Explorer .

https://graph.microsoft.com/v1.0/sites/{site-id}/lists/{list-id}/items?expand=fields($select=id,Title)

In the app/graph.service.ts in the app, this did not work . Even though you would expect it to based on the graph explorer.

.api('/sites/{site-id}/lists/{list-id}/items?fields($select=id,Title)')

Changing the app/graph.service.ts api call worked .

.api('/sites/{site-id}/lists/{list-id}/items?')
.expand('fields($select=id,Title)')

The result looked like this:

fields: {
    @odata.etag: ""d6f5b6ea-9f90-452d-98ba-e838f58d3359,1"", 
    Title: "IT SPECIALIST (MID)", 
    id: "20"
}

Here's an example site id:

some.sharepoint.com,9dk062b-2e54-4e4f-b71a-cdb74f42cc44,c6cf6b0a-cc7c-41fd-a76a-ef8f97e8a22f

Here's an example list id.

8eg8c29a-5555-4cfc-bfa4-0e907488f781

The end url won't have any {} in it.