Hello. I'm trying to use kmongo-serializer. How am I supposed to use date types, like Instant? Kotlin serialization does not provide default serializers for those types. Is there a specific way in which I should serialize them? https://litote.org/kmongo/object-mapping/#date-support does not contain any information about that.

Hey, I'm using

org.litote.kmongo:kmongo-coroutine-serialization:4.1.3

in Ktor. How would I serialize the ObjectId class to the String type in my class.

I get lots of logs about just checking the status and what not, How might I suppress those logs

How do I make references? e.g. A Book document's author field has to refer to an Author document's _id.

Hi everyone! Should I check existing of some element in db before trying to update one, otherwise insert?

Apologies if this is in the worng channel ... I'm using kotlinx.serialization and

@Contextual

to de(serialize) Instant as a Long for my ktor server and I want to de(serialize) it as a Mongo Date for db operations. I am getting the expected behaviour when updating my document, but when I

insertOne

the documents instant is being serialized as a Long not a date (L22). When I later run

updateOne

the instant is being correctly serialised (L28). Any idea what I'm doing wrong here?

Hi! Probably a very silly question:

[ERROR] /Users/acoconut/.m2/repository/org/litote/kmongo/kmongo-core/4.4.0/kmongo-core-4.4.0.jar!/META-INF/kmongo-core.kotlin_module: (-1, -1) Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.6.0, expected version is 1.4.2.

Does this mean that kmongo was compiled with 1.6.0 and that I’m using a lower version of kotlin (which I should be) that is not compatible OR does it mean that I have some other kind of version mess in my local?

Hi, I need to register custom serializer module to KMnogo serializer, but I cant find a way how to do it. I am using

kotlinx.serialization

It is mentioned in docs, but I can't get it, Does someone have a code snippet with example?

Trying to save

Point

(GeoJSON) data using kotlinx-serialization... I see Mongo has a

com.mongodb.client.model.geojson.Point

type, but kmongo doesn't recognize it.

I store a sealed class with two possible subtypes in a collection. When using typed queries, I can validate the type using the discriminator as part of the query, but is it possible to coerce the type in the query to give me access to the subtype properties? Or am I stuck with using query strings?

Hello is it possible to do a bulk upsert using Kmongo?

Hey @tim have you gotten LocalDate serialization with kotlinx.serialization and kmongo coroutines? I see there's a default implementation for LocalDate serialization but it doesn't seem to work

Hello, I’m doing an

insertMany

query and trying to use an upsert although there is no InsertManyOption for upsert I came up with the following but this is very inefficient, is there any other way to insert and ignore duplicates?

myCollection.bulkWrite(
    *customers.map {
        updateOne<Customer>(
            Customer::id eq it.id,
            KMongoUtil.toBsonModifier(it, UpdateConfiguration.updateOnlyNotNullProperties),
            upsert()
        )
    }.toTypedArray()
)

Hello team, am new to mongodb and am using it for my ktor project. How can i return the inserted document back to client after insertion. I need the doc to store it in room

Hi, I’m trying to build a sort BSON to give to my find request from a string, representing my path to the property in my collection’s class. Do you know how I could do it? I managed to do it when the properties are not nested but it’s trickier when I’m trying to access a property of one of my class properties...

fun <E : Any> SortProperty.toSortBson(kClass: KClass<E>): Bson {
    val kProperty = kClass.memberProperties.find { it.name == this.property }
        ?: throw InvalidSortPropertyException(this.property, kClass.simpleName)

    return if (this.direction == SortDirection.ASC) {
        ascending(kProperty)
    } else {
        descending(kProperty)
    }
}

I added

org.litote.kmongo:kmongo-coroutine-serialization:4.7.1

as a dependency and I’m trying to count the documents in a collection with this

val collection = database.getCollection(collectionName, Document::class.java)
collection.countDocuments()

But this gives me a

Publisher<T>

but I was expecting this to be a

suspend

function. How am I supposed to use this?

I have a data class of Tasker which has an embedded list of skills from data class named Skill. I want to querry list of taskers based on category_skill which is found inside a skill that the tasker possess.i have tried couple of solution below but which work on the mongo playground but can't work in ktor. Bellow are the data classes.

Hi guys, does anyone know of an example somewhere with kmongo and GridFS? Ive found an example using GridFSBucket.uploadFromStream but uploadFromPublisher seems to be the available method for the reactivestreams lib. thanks.

Hello again, I'm trying to add a unique index but getting an error. Tried this code........ val users = db.getCollection<User>().createIndex(User::email, indexOptions = IndexOptions().unique(true)) but it doesn't like it. 😞

What is the state of KMongo? The latest release states:

This version should be the last release in the KMongo repo (if no critical bug found).
A MR is planned to move the code into the MongoDB repository :champagne::clinking_glasses:

That's cool and all but where can we get an ETA? Is there an official MongoDB issue we can follow? I'm stuck on KMongo 4.7.2 because the Java Mongo Driver has issue on version 4.8.0, which KMongo depends on. Now it has been fixed in subsequent 4.8.x patches, but KMongo was not updated. I could use some Gradle black magic to use KMongo 4.8.0 with Mongo 4.8.x but I'm kinda against that. Now the Java Mongo Driver has been updated to 4.9.0 with a bunch of fixes and features. What do we do?

I'm attempting to use Kotlinx Serialization with KMongo and I can't seem to get the serialization to work properly; It does insert the data, but completely ignores all of the Kotlinx annotations. I see that, on the KMongo Website I'm supposed to create a custom

Json

configuration, but I can't seem to find any mention of where to use that

Json

configuration. The closest I see is the reference to registerModule and registerSerializer, but I can't find those functions anywhere either. I've included a screenshot of all the dependencies I have. Note these are all from:

implementation("org.litote.kmongo:kmongo-id-serialization:$kMongoVersion")
implementation("org.litote.kmongo:kmongo-coroutine-serialization:$kMongoVersion")

If someone could point me in the right direction I would appreciate it very much! 🙂