problem with cursorPaginate with order by column nullable

[MostafaRabia]

• Laravel Version: 8.43.0
• PHP Version: 7.4.18
• Database Driver & Version: MySql 8.0.25-0ubuntu0.20.04.1

Description:

HI!
I'm trying to order the questions based on last answer or last comment (for admin) using cursorPaginate (for speed, the data will be big in the future).
So for user:
->orderBy('last_answer', 'desc') ->orderBy('id', 'desc')
And good, working well.

In the admin:
->orderBy('last_comemnt', 'desc') ->orderBy('id', 'desc')
And cause a problem Only arrays and objects are supported when cursor paginating items. in Illuminate/Pagination/AbstractCursorPaginator.php:201 if he trying to reach page number 2.

The columns are same, datetime nullable, the cursor is sending correctly, the select is *, I debuged $item that getParametersForItem take, it's null.
Why it's null? it causes if the last_answer or last_comment is null.

Thanks.

Steps To Reproduce:

Just try to order by column that can be null, with another column that won't be ever null.

[MostafaRabia]

@paras-malhotra
Hi