How to do aggregation with sum in a Mongo query? - mongodb

Question

I'm new to MongoDB and need to write this query. My JSON Request is like this. I need to build the query in mongodb with aggregation
JSON
[
{
"_id": {
"user_id": "1",
"name": "Madhu",
"LeadName": "Test",
"status": "Lost",
"lead_value": 78000
}
},
{
"_id": {
"user_id": "1",
"name": "Madhu",
"LeadName": "Trail",
"status": "Trial",
"lead_value": 75200
}
},
{
"_id": {
"user_id": "1",
"name": "Madhu",
"LeadName": "Teja",
"status": "Customer",
"lead_value": 45000
}
},
{
"_id": {
"user_id": "1",
"name": "Madhu",
"LeadName": "Kushbu",
"status": "Trial",
"lead_value": 20000
}
},
{
"_id": {
"user_id": "1",
"name": "Madhu",
"LeadName": "Krishna",
"status": "Trial",
"lead_value": 18000
}
},
{
"_id": {
"user_id": "1",
"name": "Madhu",
"LeadName": "Test1",
"status": "Trial",
"lead_value": 12000
}
},
{
"_id": {
"user_id": "89",
"name": "Prashanth Reddy",
"LeadName": "Ganesh",
"status": "Trial",
"lead_value": 12000
}
},
{
"_id": {
"user_id": "89",
"name": "Prashanth Reddy",
"LeadName": "Hima Sree",
"status": "Customer",
"lead_value": 1750
}
}
]
I want the response like sum of the all the "Lead_values" except "Customer" and count the Status also
[
{
"_id": {
"user_id": "1",
"name": "Madhu",
"lead_value": 120354,
"count" : 5
}
},
{
"_id": {
"user_id": "89",
"name": "Prashanth Reddy",
"lead_value": 12000,
"count" : 1
}
}
]
How to write in MongoDB Aggregation?

Answer 1

You can use this query, to get your perfect result.
Here is it.
db.getCollection('YOUR_COLLECTION').aggregate([
{
$match: {
"_id.status": {$ne: "Customer"}
}
},
{
$group: {
_id: "$_id.user_id",
lead_values: {$sum: "$_id.lead_value"},
name: {$first: "$_id.name"},
count: {$sum: 1}
}
}
])
Here you can see, how we can use $sum with $group

Answer 2

You just need a simple $group stage:
db.collection.aggregate([
{
$match: {
"_id.status": {$ne: "Customer"}
}
},
{
$group: {
_id: "$_id.user_id",
lead_values: {$sum: "$_id.lead_value"},
name: {$first: "$_id.name"},
count: {$sum: 1}
}
}
])
You can now reformat the data as you wish.