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db.collection.aggregate([{$unwind:"$highlights"},{$unwind:"$highlights.texts"},{$match:{"highlights.texts.type":"hit"}},{$group:{_id:{_id:"$_id","object_infos":"$object_infos","score":"$score",},highlights:{$push:"$highlights.texts.value"}}},{$project:{_id:"$_id._id","object_infos":"$_id.object_infos","score":"$_id.score",highlights:1}}])