MongoDb How to do complex aggregation to an order Model - mongodb

Question

Hello Guys This is my Order Model :
const OrderSchema = new Schema({
orderItems: {
name: { type: String, required: true },
qty: { type: Number, required: true },
image: { type: String, required: false },
price: { type: Number, required: true },
product: {
type: mongoose.Schema.Types.ObjectId,
ref: 'Product',
required: true,
},
},
totalPrice: { type: Number, required: true },
paymentMethod: { type: String, required: true },
paymentResult: {
status: { type: String, default: 'Waiting For Payment' }
},
user: { type: mongoose.Schema.Types.ObjectId, ref: 'User', required: true },
isPaid: { type: Boolean, default: false },
paidAt: { type: Date },
OrderResult: {
status: { type: String, default: 'Waiting For Payment' }
},
isDelivered: { type: Boolean, default: false },
},{timestamps : true})
I did do This aggregation to get Users Orders Summary :
const usersOrderSummary = await Order.aggregate(
[
{$match:{} },
{$group: {_id:"$user", TotalSpent: {$sum:"$totalPrice"},TotalOrders: { $sum: 1 }}},
]
)
The Result Of this aggregation is an array of:
{
"usersOrderSummary": [
{
"_id": "6216687c0e0d9122f710a1a6",
"TotalSpent": 0.9,
"TotalOrders": 8
},
{
"_id": "628e4b96a7fd3bad9482a81c",
"TotalSpent": 9.18,
"TotalOrders": 53
}
]
}
I want your Help to do an aggregation to get this result:
I want to to do aggregation to collect the sum of completed orders and the sum of the amount that spent in this completed order
the condtion of completed order so i can only considered an order completed when
isDelivered:true
please check the schema above so it would be clear to know how order considered as completed
{
"usersOrderSummary": [
{
"_id": "6216687c0e0d9122f710a1a6",
"TotalSpent": 0.9,
"TotalOrders": 8,
"TotalCompletedOrderSpent": 0.1,
"TotalCompletedOrders": 1,
},
{
"_id": "628e4b96a7fd3bad9482a81c",
"TotalSpent": 9.18,
"TotalOrders": 53
"TotalCompletedOrderSpent": 4,
"TotalCompletedOrderSpent": 2,
}
]
}

Answer 1

Use $cond
db.collection.aggregate([
{
$match: {}
},
{
$group: {
_id: "$user",
TotalSpent: { $sum: "$totalPrice" },
TotalOrders: { $sum: 1 },
TotalCompletedOrderSpent: {
$sum: {
$cond: {
if: { $eq: [ "$isDelivered", true ] },
then: "$totalPrice",
else: 0
}
}
},
TotalCompletedOrders: {
$sum: {
$cond: {
if: { $eq: [ "$isDelivered", true ] },
then: 1,
else: 0
}
}
}
}
}
])
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