MongoDB Aggregate - How to implement match and lookup - node.js

Question

I need to get the data from two collections (expenses, accounts). The data must be between the given date range and amount range.
date, amount, currency, type is in Expenses collection and accountId is in account collection as _id.
I tried the following query but it's not returning anything.
const response = await Expense.aggregate( [
{ $match: {
$and: [
{
currency: "1",
expenseType: "1"
},
{
date: {
$gte: new Date(date.value.from) , $lte: new Date(date.value.to)
},
amount: {
$gt: parseFloat(amount.value.from) , $lt: parseFloat(amount.value.to)
}
}
],
} },
{
$lookup: {
from: "accounts",
localField: "accountId",
foreignField: "_id",
as: "account"
}
}
] )
This is the schema of expenses collection:
Document of expense collection:
Document of account collection:

Answer 1

From the attached expense document, the amount field was a String type but not a Number type.
Data
amount: "20000"
Schema
amount: {
type: Number,
required: true
}
You should revise your Expense document in MongoDB with your schema.
From your Aggregation Query, you need to convert amount from String to Decimal to compare.
Solution 1: With $expr
db.expense.aggregate([
{
$match: {
$and: [
{
currency: "1",
expenseType: "1"
},
{
date: {
$gte: new Date(date.value.from),
$lte: new Date(date.value.to)
},
},
{
$expr: {
$and: [
{
$gt: [
{
"$toDecimal": "$amount"
},
parseFloat(amount.value.from)
]
},
{
$lt: [
{
"$toDecimal": "$amount"
},
parseFloat(amount.value.to)
]
}
]
}
}
],
}
},
{
$lookup: {
from: "accounts",
localField: "accountId",
foreignField: "_id",
as: "account"
}
}
])
Solution 1 on Mongo Playground
Solution 2: Add $set as first stage
db.expense.aggregate([
{
$set: {
amount: {
"$toDecimal": "$amount"
}
}
},
{
$match: {
$and: [
{
currency: "1",
expenseType: "1"
},
{
date: {
$gte: new Date(date.value.from),
$lte: new Date(date.value.to)
},
amount: {
$gt: parseFloat(amount.value.from),
$lt: parseFloat(amount.value.to)
}
}
]
}
},
{
$lookup: {
from: "accounts",
localField: "accountId",
foreignField: "_id",
as: "account"
}
}
])
Solution 2 on Mongo Playground