How to use project in nested array using $In to get Data - mongodb

Question

I want to get to use array for searching data in mongo
Here is my data
{
"_id": ObjectID("5f0d6e394556410d486f6828"),
"branchId": "exampleId",
"info": [
{
"date": "12-10-09",
"programs": [
{
"programId": "ObjectId1",
},
{
"programId": "ObjectId2",
},
{
"programId": "ObjectId3",
},
],
}
],
}
I want to find programId by using array here is my array
const programIdArr = ["ObjectId1","ObjectId2"]
I want out put
NOTE : I want to use programIdArr search in mySql we can use something like whereIn
{
"_id": ObjectID("5f0d6e394556410d486f6828"),
"branchId": "exampleId",
"info": [
{
"date": "12-10-09",
"programs": [
{
"programId": "ObjectId1",
},
{
"programId": "ObjectId2",
},
],
}
],
}
Here is what I try to do
const program =
Models.aggregate([
{ $match: { _id: Mongoose.Types.ObjectId('5f0d6e394556410d486f6828') } },
{
//for first project I already get where date = 12-10-09
$project: {
info: {
$filter: {
input: '$info',
as: 'info',
cond: { $eq: ['$$info.date', '12-10-09'] },
},
},
},
// in this project I try to filter programId by using programIdArr It doesn't work
$project: {
info: {
$filter: {
input: '$info.programs.programId',
as: 'programId',
cond: { $in: [programIdArr] },
},
},
},
},
{ $unwind: { path: '$info' } },
])
.exec()
As I read document $in it's return only true of false I try also try to use $all but It didn't work too.

Answer 1

You can try this
[{
$match: {
_id: ObjectId("5f0d6e394556410d486f6828")
}
}, {
$unwind: {
path: "$info",
preserveNullAndEmptyArrays: false
}
}, {
$project: {
branchId: 1,
"info.date": 1,
"info.programs": {
$filter: {
input: '$info.programs',
as: 'p',
cond: {
$in: ["$$p.programId", ["ObjectId1", "ObjectId2"]]
},
},
}
}
}, {
$group: {
_id: "$_id",
branchId: {
$first: "$branchId"
},
info: {
$addToSet: "$info"
}
}
}]
Working Mongo playground