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db.collection.aggregate([{$group:{_id:"",dataDoc:{$push:{$cond:[{$eq:[{$type:"$data"},"array"]},"$$ROOT","$$REMOVE"]}},allDocs:{$push:{$cond:[{$eq:[{"$type":"$zipcode"},"string"]},"$$ROOT","$$REMOVE"]}}}},{$unwind:"$dataDoc"},{$addFields:{allDocs:{$filter:{input:"$allDocs",cond:{$in:["$$this.zipcode","$dataDoc.data"]}}}}},{$unwind:"$allDocs"},{$replaceRoot:{newRoot:"$allDocs"}}])