Get the page count as derived data - #55316
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ntsekouras
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[Type] Bug
youknowriad
reviewed
Oct 12, 2023
| meta = { | ||
| totalPages: parseInt( | ||
| response.headers.get( 'X-WP-TotalPages' ) | ||
| ), |
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I wonder if there's a way to store this in the reducer with the "perPage" as a sub key in order to retrieve the right value in the selector instead of computing it.
I wonder which is best
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I'm not super confident that I could make that change.. I checked about the sub keys, but haven't touched that part of the code at all before.
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I can make the change myself, I'm just wondering which is better. Should we rely on the server side value or the computed one.
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It's a simple calculation and it seems core does that too:
$max_pages = ceil( $total_posts / (int) $posts_query->query_vars['posts_per_page'] );
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Ok, let's keep it that way for now then, we can always change anytime :)
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Size Change: +31 B (0%) Total Size: 1.65 MB
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Flaky tests detected in f496132. 🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/6498431702
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Mamaduka
reviewed
Mar 19, 2024
| if ( query.per_page === -1 ) return 1; | ||
| const totalItems = getQueriedTotalItems( queriedState, query ); | ||
| if ( ! totalItems ) return totalItems; | ||
| return Math.ceil( totalItems / query.per_page ); |
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This can result in NaN; the query.per_page can be undefined when the request relies on the default per_page by REST API.
We can try using default 10 as a fallback, but that would be incorrect for some entities that don't support pagination or if the project changes default per_page for endpoints.
I was debugging the useEntityRecords hook triggering unstable references warning (NaN !== NaN), which led me here.
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Good catch! I guess if the per_page is not provided, we can fallback to the header of the response, since it should update properly with other changes of the query. The problem was with the perPage argument not being part of the stable key. I'll open a PR in a bit.
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What?
Recently there was an update to core-data package to include the total number of records and pages per query.
There is a bug though in getting the total pages of a query, because internally in state we keep the queries with a stable key, which doesn't include the
perPageargument. This makes sense in practice, but the stored value for total pages has the value of the last request.I kept the same APIs, but I'm calculating the total pages based on the total number of records.
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