doc: Fix simple search engine cookbook #2706
Merged
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Summary
Use array instead of ArrayCollection. It is not possible to use an ArrayCollection with a collection field type. This would result in a runtime exception: "Collection type requires value of type array or null, Doctrine\Common\Collections\ArrayCollection given (Doctrine\ODM\MongoDB\MongoDBException)".
Conversation with @malarzm in the Slack channel #mongodm-odm on 12/12/2024: