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Questions tagged [kmongo]

A Kotlin toolkit for Mongo

48 questions
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Join multiple collections in MongoDB

Greetings amigo i have one question related joining multiple collection in MongoDb i have collection schema something like below Posts Collection { "type": "POST_TYPE", "_id": "63241dffb0f6770c23663230", "user_id":…
Bhushan Maniyar
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Unit tests for Ktor with KMongo

How to make unit tests in Ktor with KMongo? How to mock database and make test on it? Let's say that I made simplest API like this: private val client = KMongo.createClient().coroutine private val database = client.getDatabase("dbName") val people =…
ktorOneQuestion
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1 answer

Does KMongo support enums?

I have a mongo collection in which there is a String field called role. This field in particular will always be filled with one of these three options: user, admin or guest. This is the reason why I decided to create an enum so it makes it easier…
Ignacio Rodríguez Suárez
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1 answer

How to configure object mapping for MongoDB with Micronaut and Kotlin + KMongo?

I'm having some difficulty configuring object mapping for MongoDB in Micronaut with Kotlin. I'm getting errors like: Decoding into a 'Asset' failed with the following exception: Cannot find a public constructor for 'Asset'. A custom Codec or…
Jeroen Knoef
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1 answer

Kotlin KMongo library nested query not working

If nested property query is using, this is always returning null, I have no ideas why, just following offcial website document document link database.getCollection().findOne(User::auth / Auth::ssaid eq p.ssaid, User::auth / Auth::password eq…
user16799920
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Using Ktor, Kmongo and kotlinx.serialization together causing ClassCastException ... What am I doing wrong?

https://github.com/reticent-monolith/winds_server is the github repo if anyone finds it easier looking there. I'm trying to use KMongo and Ktor with Kotlin's Serialization module but creating the MongoClient results in the following…
Reticent_Monolith
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how to write Mongo type query with Kotlin sealed class

I want to access Mongo DB using Kotlin with the help of Kmongo (litote.org) plugins and I only want to write Kmong Typed query. https://litote.org/kmongo/typed-queries/ My Kotlin data classes are below: data class Student( studentId:ObjectId, …
shriyash Lakhe
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1 answer

KMongo queries producing different results from Mongo Shell

I'm currently using KMongo and it's very nice. Simple to use, nice syntax, etc. But I ran into an issue while querying some data that I cannot figure it out. I'm filtering for some fields and when I run my queries on Mongo Shell or robo 3T it works…
Fabiano
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1 answer

Ktor with Kmongo and kotlinx.serialization

I have a setup where I use KTor with KMongo and Kotlinx.Serialization. The Kmongo part works, I can get and put my Class @Serializable data class Task(@ContextualSerialization @SerialName("_id") val _id : Id = newId(), val…
moortuvivens
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0 answers

How to correctly serialize an mongoDB ObjectId with kotlinx

I am trying to serialize a MongoDB ObjectId using a Kotlin, Spring Boot, KMongo and Kotlinx. The problem is, that the ObjectId is getting serialized as timestamp: Expected Result: {"name":"Game…
EyedPeas
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1 answer

KMongo custom serializer: readEndDocument can only be called when State is END_OF_DOCUMENT, not when State is VALUE

I'm trying to make a custom serializer for the Color class using the kmongo-coroutine-serialization dependency. I'm getting an exception when doing it saying: Exception in thread "main" org.bson.BsonInvalidOperationException: readEndDocument can…
Marian
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1 answer

How to implement Pagination with Ktor and Kmongo

Problem: To Implement Pagination on the server side using Ktor and Kmongo. Tech Stacks: Kotlin as Programming Language. Ktor as Web Framework. MongoDb as database. Kmongo as Sql framework. I cannot find any tutorial or posts that describes to…
Adi
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1 answer

How to use GRIDFSBuckets with KMongo coroutine client

I am trying to use GRIDFSBuckets in ktor to upload files. I am using KMongo coroutine extension to create my MongoDB client. When calling GRIDFSBucket.create(). Its parameters need a MongoDatabase and bucketName. This is fine but KMongo coroutines…
EmmaneulO1
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2 answers

MongoDB Database is not created in Kotlin(Ktor)

please i need help with connecting a mongodb to my ktor application. This is the code i have, as followed from this article: https://himanshoe.com/mongodb-in-ktor class MongoDataHandler { val client = KMongo.createClient().coroutine val database =…
Solomon Tolu Samuel
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2 answers

Delegate issue with Mongo and Kotlin

I've recently been using Kmongo library and Kotlin together however I've made an issue on Kmongo but I'm unsure it is related to the library. I'm trying to persist my data onto my mongo database (version 4.2.2) @Serializable data class Person(val…
Biscuit
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