db={"suggestions":[{"_id":ObjectId("5e7d7c35d86d85088863f4df"),"channelId":"23435553","text":"tset tset tset tset tset ","postAnonymously":false,"user":{"id":"183894740","role":"moderator"},"status":"APPROVED",},{"_id":ObjectId("5e7d7c47d86d85088863f4e0"),"channelId":"23435553","text":"testetaWETYAwyaWE4Y","postAnonymously":false,"user":{"id":"23435553","role":"broadcaster"},"status":"APPROVED",}],"votes":[{"suggestionId":ObjectId("5e7d7bf7d86d85088863f4de"),"user":{"id":"183894740",},"channelId":"23435553","voteType":"upVote"},{"suggestionId":ObjectId("5e7d7c35d86d85088863f4df"),"user":{"id":"183894740",},"channelId":"23435553","voteType":"upVote"},{"suggestionId":ObjectId("5e7d7c35d86d85088863f4df"),"user":{"id":"23435553",},"channelId":"23435553","voteType":"downVote"},{"suggestionId":ObjectId("5e7d7c47d86d85088863f4e0"),"user":{"id":"23435553",},"channelId":"23435553","voteType":"upVote"}]}

db.suggestions.aggregate([{$match:{"channelId":"23435553",}},{$lookup:{from:"votes",localField:"_id",foreignField:"suggestionId",as:"votes"}},{$match:{"votes":{"$elemMatch":{"user.id":"23435553","voteType":"upVote",}},}},])