How can i calculate price positive and negative price using mongodb or robomongo?

Question

below is my userpricing collection data

{
    \"_id\" : ObjectId(\"584bc9ba420a6b189c510af6\"),
    \"user_id\" : 1,
    \"mobilenumber\":\"01234\",
    \"p         


        

Answer 1

You can do it by using conditional sum and export in another collection use $out: collectionName

can try it :

db.getCollection('userpricing').aggregate([
    {$group: {
        _id:"$user_id", 
        user_id: {$first: "$user_id"}, 
        Totalpositiveprice:{$sum:{$cond:[{ '$gt': ['$price', 0]}, "$price", 0]}}, 
        Totalnegativeprice:{$sum:{$cond:[{ '$lt': ['$price', 0]}, "$price", 0]}},
        Balanceprice:{"$sum":"$price"}}
     },
     {$project: {_id:0, user_id:1, Totalpositiveprice:1, Totalnegativeprice:1, Balanceprice:1}},
     {$out: "summary"}
])

N.B: result exported in summary collection