Fixed get helper cache optimizations #19865
Merged
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ref ENG-747
ref https://linear.app/tryghost/issue/ENG-747
H'okay - so what we're trying to do here is make get helper queries more
cacheable. The way we're doing that is by modifying the filter used when
we're trying to remove a single post from the query.
The idea is that we can remove that restriction on the filter, increase
the number of posts fetched by 1 and then filter the fetched posts back
down, this means that the same query, but filtering different posts,
will be updated to make exactly the same query, and so share a cache!
We've been purposefully restrictive in the types of filters we
manipulate, so that we only deal with the simplest cases and the code is
easier to understand.