MongoDB unknown top level operator - mongodb

Question

Well I'm having problems with aggragate of the mongo, I need to validate if in all the answers it doesn't have a field marked as deletedAt. My aggragate looks like this:
[
{ '$match': { _id: "5f0cc0e676de351ce21a752b" } },
{
'$lookup': {
from: 'Exams',
localField: 'exams.idExams',
foreignField: '_id',
as: 'exams'
}
},
{
'$lookup': {
from: 'Sports',
localField: 'idSports',
foreignField: '_id',
as: 'sportPracticed'
}
},
{
'$unwind': { path: '$sportPracticed', preserveNullAndEmptyArrays: true }
},
{
'$lookup': {
from: 'Galery',
localField: '_id',
foreignField: 'idPlayer',
as: 'galery'
}
},
{
'$lookup': {
from: 'EvaluationPlayer',
localField: '_id',
foreignField: 'idPlayer',
as: 'evaluationPlayer'
}
},
{
'$lookup': {
from: 'Evaluation',
localField: 'evaluationPlayer.idEvaluation',
foreignField: '_id',
as: 'evaluations'
}
},
{
'$lookup': {
from: 'Category',
localField: 'evaluations.idCategory',
foreignField: '_id',
as: 'category'
}
},
{
'$lookup': {
from: 'Club',
localField: 'idClub',
foreignField: '_id',
as: 'club'
}
},
{ '$unwind': { path: '$club', preserveNullAndEmptyArrays: true } },
{
'$lookup': {
from: 'Agent',
localField: 'idAgent',
foreignField: '_id',
as: 'agent'
}
},
{ '$unwind': { path: '$agent', preserveNullAndEmptyArrays: true } },
{
$match: {
$and: [
{ $exams: { $elemMatch: { deletedAt: { $exists: false } } } },
{ $sportPracticed: { deletedAt: { $exists: false } } },
{ $galery: { $elemMatch: { deletedAt: { $exists: false } } } },
{ $evaluationPlayer: { $elemMatch: { deletedAt: { $exists: false } } } },
{ $evaluations: { $elemMatch: { deletedAt: { $exists: false } } } },
{ $category: { $elemMatch: { deletedAt: { $exists: false } } } },
{ $club: { deletedAt: { $exists: false } } },
{ $agent: { deletedAt: { $exists: false } } },
]
}
}
]
However, when this code is executed, it returns the error: unknown top level operator: $ exams.
How can I solve this problem ?
My plans is not to bring data from relationships where it has already been deleted and what says that it was deleted is the existence of the deleteadAt;
Collection Player:
[{
"_id": "5f0cc0e676de351ce21a752b",
"language": "pt-br",
"country": "BR",
"status": true,
"name": "Laura Silva",
"nickname": "laurasilva",
"dateOfBirth": "1995-05-01T00:00:00.000Z",
"email": "laurasilva#gmail.com",
"phones": [],
"cpf": "54721452365",
"gender": "F",
"father": "Luiz Silva",
"mother": "Larissa Silva",
"weight": "67",
"height": "1.67",
"currentTeam": {
"name": "América",
"initialDate": "2020-01-01"
},
"professionalPlayer": true,
"bird": "ARW1",
"idSports": "5f0cbe10e6c0930b8dcc5181",
"competitions": [],
"exams": [],
"preference": [],
"coachReferrals": [],
"createdAt": "2020-07-13T20:15:34.348Z",
"updatedAt": "2020-07-13T20:15:34.348Z",
"__v": 0,
"idAgent": null,
"idClub": null
},
{
"_id": "5ee644c0280583764bfe7d97",
"currentTeam": {
"name": "Cruzeiro",
"initialDate": "2019-02-25"
},
"network": {
"instagram": {
"url": "#renanmoaesoficial"
}
},
"language": "pt-br",
"country": "BR",
"status": true,
"name": "Renan Moraes",
"nickname": "renanmoraes",
"dateOfBirth": "1993-01-21T00:00:00.000Z",
"email": "renan.desenvolviemnto#gmail.com",
"phones": [
{
"_id": "5ee644c0280583764bfe7d98",
"phone": "(31) 98796-1357"
}
],
"cpf": "123.367.952-85",
"gender": "M",
"father": "Antonio",
"mother": "Sandra",
"weight": "1,80",
"height": "45",
"professionalPlayer": false,
"bird": "2551566655",
"idSports": "5ee640d040b0a0649799c531",
"exams": [
{
"results": [],
"attestation": [],
"_id": "5ee644c0280583764bfe7d9a",
"idExams": "5ee6405f061a1362c3778435"
},
{
"results": [],
"attestation": [],
"_id": "5ee644c0280583764bfe7d99",
"idExams": "5ee6406e061a1362c3778436"
}
],
"standardPhoto": "https://exame.com/wp-content/uploads/2018/10/capaprofile.jpg?quality=70&strip=info",
"competitions": [],
"preference": [],
"coachReferrals": [],
"createdAt": "2020-06-14T15:39:44.198Z",
"updatedAt": "2020-06-14T15:39:44.198Z",
"__v": 0,
"idAgent": null,
"idClub": "5f176c8d58beb94efe56c59b"
}]
Collection medicalExams:
{
"_id": "5ee6406e061a1362c3778436",
"status": true,
"name": "Exames das prostatas",
"value": "1",
"type": "A",
"createdAt": "2020-06-14T15:21:18.114Z",
"updatedAt": "2020-06-14T15:21:18.114Z",
"__v": 0
},
{
"_id": "5ee6405f061a1362c3778435",
"status": true,
"name": "Exames dos rins",
"value": "3",
"type": "M",
"createdAt": "2020-06-14T15:21:03.405Z",
"updatedAt": "2020-06-14T15:21:03.405Z",
"__v": 0
}
Here on this site there is an example of the error, in which case the two items would need to come ... https://mongoplayground.net/p/IgnIt8wGvKq

Answer 1

Key references in $match stage shouldn't begin with $ sign.
Remove $ sign from the $match stage.
Also, the deletedAtkey for last two conditions should not be in separate parenthesis.
{
$match: {
$and: [
{ exams: { $elemMatch: { deletedAt: { $exists: false } } } },
{ galery: { $elemMatch: { deletedAt: { $exists: false } } } },
{ evaluationPlayer: { $elemMatch: { deletedAt: { $exists: false } } } },
{ evaluations: { $elemMatch: { deletedAt: { $exists: false } } } },
{ category: { $elemMatch: { deletedAt: { $exists: false } } } },
{ "sportPracticed.deletedAt": { $exists: false } },
{ "club.deletedAt": { $exists: false } },
{ "agent.deletedAt": { $exists: false } },
]
}
}

Answer 2

Well, I managed to solve my problem .. It turns out that I needed to make a pipeline for each existing lookup relationship, careful that I was looking for the data in the correct way.
I had relationships that were made in an array, and I needed to match each item in my array with an id from another collection. And to achieve this I added let to declare variables to be used within my lookup and then use $ in to do specific searches for those ids ..
Anyway the final object was like this, I took some items that were also not important to make it simpler.
{
"$lookup": {
"from": "Exams",
"let": {
"exams_items": "$exams.idExams"
},
"pipeline": [
{
"$match": {
"$expr": {
"$in": [
"$_id",
"$$exams_items"
]
},
"deletedAt": {
$exists: false
}
}
}
],
"as": "allExams"
}
},
{
"$lookup": {
"from": "Sports",
"let": {
"id_sport": "$idSports"
},
"pipeline": [
{
"$match": {
"$expr": {
"$eq": [
"$_id",
"$$id_sport"
]
},
"deletedAt": {
$exists: false
}
}
}
],
"as": "sportPracticed"
}
},
{
$unwind: {
"path": "$sportPracticed",
"preserveNullAndEmptyArrays": true
}
},
{
"$lookup": {
"from": "Galery",
"let": {
"id_player": "$_id"
},
"pipeline": [
{
"$match": {
"$expr": {
"$eq": [
"$idPlayer",
"$$id_player"
]
},
"deletedAt": {
$exists: false
}
}
}
],
"as": "galery"
}
},
{
"$lookup": {
"from": "EvaluationPlayer",
"let": {
"id_player": "$_id"
},
"pipeline": [
{
"$match": {
"$expr": {
"$eq": [
"$idPlayer",
"$$id_player"
]
},
"deletedAt": {
$exists: false
}
}
}
],
"as": "evaluationPlayer"
}
},
{
$lookup: {
from: "Club",
localField: "idClub",
foreignField: "_id",
as: "club"
}
},
{
$unwind: {
"path": "$club",
"preserveNullAndEmptyArrays": true
}
},
{
$lookup: {
from: "Agent",
localField: "idAgent",
foreignField: "_id",
as: "agent"
}
},
{
$unwind: {
"path": "$agent",
"preserveNullAndEmptyArrays": true
}
}