Allow views attachment display use own pager options

Added patch #42 to Drupal 9.5.5 and the pagers are visible! Without patch, no pager was visible on a views page which has attachments also having pagers .

#42 Patch applies cleanly to 10.1.x.
Be sure that Render pager is enabled.

With manual testing, it looks like the Attachment pager doesn't consistently work independently. It's the same behavior reported in #55 🐛 Allow views attachment display to use its own pager options Needs work , but I'm currently testing a view without ajax.

In a view without ajax, Full pager:

1. Page - 2
2. Attachment - Last
3. Page - First
4. Attachment gets reset back to 1
5. Page (url is /myview?page=0) - Next
6. Attachment - 3
7. Page - 1
8. Attachment gets reset back to 1
9. Page - Last
10. Attachment - 2
11. Page - Previous
12. Attachment gets reset back to 1
13. Attachment - Last
14. Page - Next
15. Attachment gets reset back to 1
16. Attachment - 2
17. Page - 2
18. Attachment gets reset back to 1

I have not applied a patch from 2858890 🐛 Drupal.views.ajaxView is not initializing pagers in nested views Needs work , but I'll try that next and update this comment.

This problem might be a bit wider-reaching than the scope of this module. I couldn't get a single pager to display anywhere on the page when giving a page and its attachment a pager each, whether the attachment inherited or not, with or without "render the pager" selected.

Any chance of getting something like this in views so we don't have to hack core?

@dmudie yes there is! It takes effort from interested parties because this is free open-source software.

Currently the outstanding tasks are listed as tags on the issue:

Needs tests, Needs issue summary update, Needs steps to reproduce

It will also need to pass the core gates → to be committed.

Simple reroll patch against 10.3.6

Tests no longer run against patches.

Please convert this to an mr.

PHPSTAN errors are fixed.

That leaves test coverage, issue summary update and steps to reproduce (in Drupal 11.x).