Filtering by multiple authors does not work

[alegontarz]

Describe the bug

When filtering by authors, the displayed number of publications does not reflect the combined count of the selected authors. For example, if one author has 2 publications and another has 2 publications, only 2 publications are shown instead of the expected 4

To Reproduce

Steps to reproduce the behavior:

1. Go to https://sandbox.dspace.org/home
2. Click on the "Sfetcu, Nicolae" checkbox
3. Click on any of the another checkbox.
4. Observe the number of the results.

Expected behavior

The filter should aggregate the publication counts for the selected authors correctly.

Screen.Recording.2025-04-11.at.14.15.33.mov

[kshepherd]

This is actually expected behaviour. The filter values (facets) are AND'd, so the search results you see with two authors filtered are the set of publications that both people have authored.

The counts displayed in the badges are not the total counts of publications in the repository for a given author, they are the counts for that author within the current set of search results.

If you want to see all publications by author A or author B, then this would be better done in the main search box using lucene operators, like https://sandbox.dspace.org/search?spc.page=1&query=%22Simmons,%20Cameron%22%20OR%20%22Sfetcu,%20Nicolae%22

[tdonohue]

@kshepherd is correct. This is expected behavior and looks to be working properly. If you click on "Simmons, Cameron" it will list items only written by that author. If you then check a second author (e.g. "Eens, Marcel") then you'll see only items that are written by BOTH people (i.e. items where they were co-authors)

@kshepherd : I see you assigned this to yourself. Are you working on some improvement here, or should we just close this ticket?

[saschaszott]

I’ve already created a backend issue (feature request) for this use case 👉 DSpace/DSpace#10073

[kshepherd]

Thanks @saschaszott
@tdonohue I left this open because I wondered if it would lead to a discussion/feature request such as the one sascha opened - I think "show me all publications by any of the selected authors" is a perfectly good and reasonable search request, it's just not how DSpace faceting works ;)

So I'll close this issue now. @alegontarz thanks for reporting and testing this out, and I encourage you to add your use case and ideas to DSpace/DSpace#10073 as this could be a good improvement for the future.