[Translateable] Document the usage of refresh query hint if cache is used #2960
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This addition to the documentation helps to prevent for running into the issue #1021.
This is the issue in short:
If query caching is enabled the
TranslationWalker
won't be used anymore once the query is cached. Therefore theQuery::HINT_REFRESH
, which is normally set by theTranslationWalker
, won't be set automatically.This leads to the issue, that once a translatable entity is loaded a second query with another locale won't update the translatable properties in the entity.
Adding the
Query::HINT_REFRESH
manually to the query will fix the issue.