Query block taxonomy filter does not work on frontend if taxonomy is not set to publicly_queryable about gutenberg

[t-hamano]

Thanks for the report.

From my understanding, the fact that a taxonomy with publicly_queryable set to false can be selected on the editor side seems to be a bug in itself.

For example, the blocks below filter only taxonomies for which publicly_queryable is true.

Next post / Previous post:

https://github.com/WordPress/gutenberg/blob/9a8984afb45df1635b2a5048b33e8ab9f95bff27/packages/block-library/src/post-navigation-link/edit.js#L79-L86

Post Terms:

https://github.com/WordPress/gutenberg/blob/9a8984afb45df1635b2a5048b33e8ab9f95bff27/packages/block-library/src/post-terms/edit.js#L50-L58

On the other hand, the Query Loop block does not take publicly_queryable into account:

https://github.com/WordPress/gutenberg/blob/9a8984afb45df1635b2a5048b33e8ab9f95bff27/packages/block-library/src/query/utils.js#L130-L144

[eric-michel]

Thanks for the quick reply! I did consider that it might be a bug that non-publicly-queryable taxonomies would appear in the filter at all. However, I'm hoping this will be fixed such that they can be reliably used.

I think it makes sense for non-publicly-queryable taxonomies to be hidden from the Post Terms block (why publicly display terms that are not public?) but there are many applications in which I'd like to filter a query block based on an otherwise-hidden taxonomy. I'm actually dealing with that circumstance right now, which is how I discovered this issue.