$elemMatch in an MongoDB aggregation - mongodb

Question

I am attempting to write a query builder for aggrigation's ( Our app has one for the find api, and we have some use cases where aggrigation's are needed )
in find one example we use it for is for pre-filtering document's to only one's they should have access to ( Reduces the load on our auth system ), But I can not seem to find a way to do that with aggregation
How would I re-write this in an aggrigation pipeline?
db.collection.find({
participants: {
"$elemMatch": {
scopes: {
"$in": [
"READWRITE",
"READ",
"OWNER"
],
"$nin": [
"EXCLUDE"
]
},
module_id: {
"$in": [
"bdc1ab4d-8c58-48cb-b811-e42a0d778df3",
"e0f26978-37ea-4415-9213-fb48dbfc3630"
]
}
}
}
})
Example Doc's
{
"title": "One Document",
"participants": [
{
"id": "2464b4a6-96c1-4dca-b764-34e424499e9f",
"module_name": "USER",
"module_id": "bdc1ab4d-8c58-48cb-b811-e42a0d778df3",
"roles": [
"MEMBER"
],
"scopes": [
"OWNER"
],
},
{
"id": "e0e58850-a6ce-4b89-a527-71bcdd57014a",
"module_name": "ORGANIZATION",
"module_id": "e0f26978-37ea-4415-9213-fb48dbfc3630",
"roles": [
"MEMBER"
],
"scopes": [
"READWRITE"
],
}
]
},
{
"title": "another document",
"participants": [
{
"id": "9edae792-6fdd-47f4-900d-e6bc11fa8e7a",
"module_name": "USER",
"module_id": "579b4b72-5dba-4d0c-bf21-2982e0a2ff94",
"roles": [
"MEMBER"
],
"scopes": [
"OWNER"
],
},
{
"id": "b72eea73-837d-492d-aa11-d0edb994b6ee",
"module_name": "USER",
"module_id": "bdc1ab4d-8c58-48cb-b811-e42a0d778df3",
"roles": [
"MEMBER"
],
"scopes": [
"READWRITE"
],
},
{
"id": "cae84997-079f-4a2b-9b4d-f1b4f152f697",
"module_name": "ORGANIZATION",
"module_id": "25b3a235-f6c3-45d6-b64b-bb1e48639bfb",
"roles": [
"MEMBER"
],
"scopes": [
"READWRITE"
],
}
]
}

Answer 1

The same can be done in the aggregation pipeline using $match.
db.collection.aggregate([
{
$match:{
"participants":{
$elemMatch:{
"scopes":{
$in:[ 'READWRITE', 'READ', 'OWNER' ],
$nin:[ 'EXCLUDE' ]
},
"module_id":{
$in:[ 'bdc1ab4d-8c58-48cb-b811-e42a0d778df3','e0f26978-37ea-4415-9213-fb48dbfc3630' ]
}
}
}
}
}
]).pretty()