query working in mongoshell but not in nodejs - node.js

Question

Hi below is the description of the issue i am facing
mongoShell query
db.masters.aggregate([
{
$match: {
_id: ObjectId("5e2554ec3405363bc4bf86c0")
}
}, {
$lookup: {
from: 'masters',
localField: 'mappedVendors',
foreignField: '_id',
as: 'mappedVendors'
}
}, { $unwind: '$mappedVendors'}, { $replaceRoot: { newRoot: "$mappedVendors" } },
{
$lookup:
{
from: "orders",
let: { mappedVendorId: "$_id" },
pipeline: [
{
$match: { $expr: { $eq: ["$orderCreatedBy", "$$mappedVendorId"] } }
},
{ $project: { orderCreatedOn: 1, isApproved: 1 } }
],
as: "orders"
}
},{
$lookup:
{
from: "payments",
let: { mappedVendorId: "$_id" },
pipeline: [
{
$match: { $expr: { $eq: ["$paymentDoneBy", "$$mappedVendorId"] } }
},
{ $project: { outstanding: 1 } }
],
as: "payments"
}
},
{ $project: { name: 1, phoneNo: 1, address: 1, depotCode: 1, orders: 1, payments: 1 } }
]).pretty()
response i am getting in mongoshell
{
"_id" : ObjectId("5e2555643405363bc4bf86c4"),
"phoneNo" : 9992625541,
"name" : "vendor4",
"address" : "4 vendor address 4",
"depotCode" : "D3139",
"orders" : [ ],
"payments" : [
{
"_id" : ObjectId("5dd7aa6c31eb913a4c4a487c"),
"outstanding" : 300
}
]
}
{
"_id" : ObjectId("5e2555783405363bc4bf86c5"),
"phoneNo" : 9992625542,
"name" : "vendor5",
"address" : "5 vendor address 5",
"depotCode" : "D3139",
"orders" : [
{
"_id" : ObjectId("5e2564323405363bc4bf86c6"),
"isApproved" : false,
"orderCreatedOn" : ISODate("2020-01-20T08:26:26.812Z")
},
{
"_id" : ObjectId("5e27fd3da42d441fe8a89580"),
"isApproved" : false,
"orderCreatedOn" : ISODate("2020-01-15T18:30:00Z")
}
],
This query in shell is working as expected in shell but when i am trying this in nodejs its returning empty[].
below is the description of my nodejs file
1: Mongodb Connection string
const mongoose = require('mongoose')
mongoose.connect('mongodb://127.0.0.1:27017/#####App', {
useNewUrlParser: true,
useCreateIndex: true,
useFindAndModify:false,
useUnifiedTopology: true
})
NOTE: ##### is not my code
2:nodejs controller
exports.vendorWiseIndent = async (req, res) => {
const { dealerId } = req.body
try {
const order = await Master.aggregate([
{
$match: {
_id: mongoose.Types.ObjectId(dealerId)
}
}, {
$lookup: {
from: "masters",
localField: "mappedVendors",
foreignField: "_id",
as: "mappedVendors"
},
},
{ $unwind: "$mappedVendors" }, { $replaceRoot: { newRoot: "$mappedVendors" } },
{
$lookup:
{
from: "orders",
let: { mappedVendorId: "$_id" },
pipeline: [
{
$match: { $expr: { $eq: ["$orderCreatedBy", "$$mappedVendorId"] } }
},
{ $project: { orderCreatedOn: 1, isApproved: 1 } }
],
as: "orders"
}
}, {
$lookup:
{
from: "payments",
let: { mappedVendorId: "$_id" },
pipeline: [
{
$match: { $expr: { $eq: ["$paymentDoneBy", "$$mappedVendorId"] } }
},
{ $project: { outstanding: 1 } }
],
as: "payments"
}
},
{ $project: { name: 1, phoneNo: 1, address: 1, depotCode: 1, orders: 1, payments: 1 } }
])
console.log(order)
return res.status(200).json({
order
});
} catch (error) {
res.send(error);
}}
I have also tried it with just {_id: dealerId}
3"nodejs router file
router.post("/vendorwiseindent", vendorWiseIndent.vendorWiseIndent);
POSTMAN BODY & url
POST: http://localhost:5002/vendorwiseindent
{
"dealerId": "5e2554ec3405363bc4bf86c0"
}
POSTMAN RESPONSE:
{
"order": []
}
I have also tried it with just{ _id: dealerId}
now mongodb database contains multiple collections and i have already other API's running so the db which is connected is right,there has to be some other issue that this query is not working in nodejs or rather its returning an empty array as order:[] but the query is working in shell
"mongoose": "5.7.4" & mongodb version is 4.2

Answer 1

nodejs controller files need be checked,
ADD
`const mongoose = require('mongoose ')`
at the top
dealerId was not getting converted to objectID as it was missing, after its addition POSTMAN response is mentioned below:
{
"order": [
{
"_id": "5e2555643405363bc4bf86c4",
"phoneNo": 9992625541,
"name": "vendor4",
"address": "4 vendor address 4",
"depotCode": "D3139",
"orders": [],
"payments": [
{
"_id": "5dd7aa6c31eb913a4c4a487c",
"outstanding": 300
}
]
},
{
"_id": "5e2555783405363bc4bf86c5",
"phoneNo": 9992625542,
"name": "vendor5",
"address": "5 vendor address 5",
"depotCode": "D3139",
"orders": [
{
"_id": "5e2564323405363bc4bf86c6",
"isApproved": false,
"orderCreatedOn": "2020-01-20T08:26:26.812Z"
},
{
"_id": "5e27fd3da42d441fe8a89580",
"isApproved": false,
"orderCreatedOn": "2020-01-15T18:30:00.000Z"
}
],
"payments": []
}
]
}