db={"suggestions":[{"_id":ObjectId("5e7d7bf7d86d85088863f4de"),"channelId":"23435553",},],"emotes":[{"suggestionId":ObjectId("5e7d7bf7d86d85088863f4de"),"emoteId":"A",},{"suggestionId":ObjectId("5e7d7bf7d86d85088863f4de"),"emoteId":"A",},{"suggestionId":ObjectId("5e7d7bf7d86d85088863f4de"),"emoteId":"B",},],"bounties":[{"suggestionId":ObjectId("5e7d7bf7d86d85088863f4de"),"userId":"user1","bountyAmount":50,},{"suggestionId":ObjectId("5e7d7bf7d86d85088863f4de"),"userId":"user1","bountyAmount":100,},{"suggestionId":ObjectId("5e7d7bf7d86d85088863f4de"),"userId":"user2","bountyAmount":200,},]}

db.suggestions.aggregate([{$match:{"channelId":"23435553",}},{$lookup:{from:"emotes",localField:"_id",foreignField:"suggestionId",as:"emotes"}},{$lookup:{from:"bounties",localField:"_id",foreignField:"suggestionId",as:"bounties"}},])