IFile/IListItem - CheckIfUserHasPermissionsAsync Throws ->System.NullReferenceException:

[Cro-Bagy]

Category

• Bug

Describe the bug

CheckIfUserHasPermissionAsync for IListItem (coming from IFile) throws "System.NullReferenceException: 'Object reference not set to an instance of an object.'"

It's happening in
ListItem.cs file line -> 1679 - > Method "BuildGetUserEffectivePermissionsApiCall"

Seems that the Parent.Parent is not a list, it's a Web object.
var parentList = Parent.Parent as List;
Then it fails during string formatting because parentList is null

Steps to reproduce

var file = await clientContext.Web.GetFileByServerRelativeUrlAsync(relativeUrl, 
            f => f.ListItemAllFields.QueryProperties(p => p.ParentList), f => f.Parent);
var item = file.ListItemAllFields;

//BUG in PnP.Core - Workaround - Uncomment if you want that it works
//item.Parent.Parent = item.ParentList;

return await item.CheckIfUserHasPermissionsAsync(spUser.UserPrincipalName, permission);

Expected behavior

To not do the workaround

var file = await clientContext.Web.GetFileByServerRelativeUrlAsync(relativeUrl, 
            f => f.ListItemAllFields.QueryProperties(p => p.ParentList), f => f.Parent);
var item = file.ListItemAllFields;

return await item.CheckIfUserHasPermissionsAsync(spUser.UserPrincipalName, permission);

Environment details (development & target environment)

• SDK version: 1.8.0
• OS: Windows 10
• SDK used in: Console App & ASP.Net Web app
• Framework: net6.0
• Tooling: VS 2022

[jansenbe]

Thanks for using PnP Core SDK and reporting this @denbg9fe , I'll have a look.

[jansenbe]

@denbg9fe : already fixed this one :-) Fix will appear in next nightly (version 1.8.100 or higher). Closing this issue now.