Hi,
I have this pipeline in bson
pipe := db.C(COLLECTION).Pipe([]bson.M{
{"$match": bson.M{"nfType": "AMF"}},
{"$unwind": bson.M{"$ipv4Addresses"}},
{"$group": bson.M{
"_id": bson.M{"$distance"},
"ipv4Addresses": bson.M{"$addToSet": "$ipv4Addresses"},
}}})
err := pipe.All(&ip)
but am getting error "missing key in map literal" in line
{"$unwind": bson.M{"$ipv4Addresses"}}, and "_id": bson.M{"$distance"}. I have
tried changing
them to
{"$unwind": "$ipv4Addresses"}, and
bson.M{"_id": "$distance"}
but it not working.
On Tuesday, July 9, 2019 at 3:49:06 PM UTC+3, daniel wilson wrote:
>
>
>
> I can query my mongodb collection to get the ipv4Addresses based on the
> nfType and the minimum distance using the command line query
>
> db.nfinstancesdb.aggregate([
> {
> "$match": {
> "nfType": "AMF"
> }
> },
> {
> "$unwind": "$ipv4Addresses"
> },
> {
> $group: {
> "_id": "$distance",
> "ipv4Addresses": {
> "$addToSet": "$ipv4Addresses"
> }
> }
> },
> {
> "$sort": {
> "_id": 1
> }
> },
> {
> "$limit": 1
> }])
>
> This give the output am expecting as
>
> [{"_id": 10,"ipv4Addresses": ["172.16.0.11","172.16.0.10"]}]
>
> How can I write the bson form of the above query on Go?
>
> I did in the function below but am getting all the ipv4Addresses instead
> of the above result.
>
> func (m *NfInstanceDataAccess) FindIp(nfType string) ([]NfInstance, error) {
> var ip []NfInstance
>
> findQ := bson.M{"nfType": nfType}
> filter := bson.M{"ipv4Addresses": 1}
> err := db.C(COLLECTION).Find(findQ).Select(filter).All(&ip)
> if err != nil {
> return ip, err
> }
> return ip, nil}
>
> My collection has the following items
>
> {
> "nfInstanceID": "1",
> "nfType": [
> "AMF"
> ],
> "nfStatus": [
> "REGISTERED"
> ],
> "ipv4Addresses": [
> "172.16.0.10"
> ],
> "distance": 10
> },
> {
> "nfInstanceID": "2",
> "nfType": [
> "UPF"
> ],
> "nfStatus": [
> "REGISTERED"
> ],
> "ipv4Addresses": [
> "172.16.0.20"
> ],
> "distance": 20
> },
> {
> "nfInstanceID": "3",
> "nfType": [
> "AMF"
> ],
> "nfStatus": [
> "REGISTERED"
> ],
> "ipv4Addresses": [
> "172.16.0.30"
> ],
> "distance": 30
> },
> {
> "nfInstanceID": "4",
> "nfType": [
> "AMF"
> ],
> "nfStatus": [
> "REGISTERED"
> ],
> "ipv4Addresses": [
> "172.16.0.11"
> ],
> "distance": 10
> }
>
> And I am expecting the same or similar output.
>
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