Sample code issue. Unresolved reference for MongoClient.create

I’m converting from a local Realm to one backed by MongoDB server. I follow the tutorial and all seems to go well but when I attempt to write the code to connect, I get an Unresolved Reference on MongoClient.create.

My code looks like this:

import io.realm.kotlin.Realm
import io.realm.kotlin.RealmConfiguration
import io.realm.kotlin.ext.isManaged
import io.realm.kotlin.ext.query
import io.realm.kotlin.query.RealmResults
import org.mongodb.kbson.ObjectId
import todaysDateAsLong
import org.bson.Document
import com.mongodb.reactivestreams.client.MongoClient
import kotlinx.coroutines.runBlocking



fun connectToRealmServer() : Realm {
    // Replace the placeholders with your credentials and hostname
    val uri = "mongodb+srv://OptimalHealth:<password>@atlascluster.j1c9yxd.mongodb.net/?retryWrites=true&w=majority&appName=AtlasCluster"

    val mongoClient = MongoClient.create(uri)  //UNRESOLVED HERE
    val database = mongoClient.getDatabase("sample_mflix")
    val collection = database.getCollection<Document>("movies")
    runBlocking {
        val doc = collection.find(eq("title", "Back to the Future")).firstOrNull()  //AND HERE on the EQ
        if (doc != null) {
            println(doc.toJson())
        } else {
            println("No matching documents found.")
        }
    }
    mongoClient.close()
}

My build.gradle looks like this (cut down to just the germane area)

dependencies {
    implementation(libs.androidx.material)
    implementation(libs.androidx.material3.android)
    implementation(libs.mongodb.driver.kotlin.coroutine)
    implementation(libs.bson.kotlinx)
}

And the libs.versions.toml looks like this:

mongodbDriverKotlinCoroutine = "5.0.0"
....
mongodb-driver-kotlin-coroutine = { module = "org.mongodb:mongodb-driver-kotlin-coroutine", version.ref = "mongodbDriverKotlinCoroutine" }

It acts like it’s a classpath issue assuming the tutorial is correct, but everything looks correct to me. Here is the structure in Android Studio.

What is it that I’m doing wrong, please?

MongoStructure1795×738 84.9 KB

Note that I updated to 5.1.0 just in case, but it didn’t help. Here is what things look like and what is suggested (that didn’t help).

MongoCode1795×757 126 KB

import com.mongodb.reactivestreams.client.MongoClient
import io.realm.kotlin.Realm
import io.realm.kotlin.RealmConfiguration
import io.realm.kotlin.ext.isManaged
import io.realm.kotlin.ext.query
import io.realm.kotlin.query.RealmResults
import org.mongodb.kbson.ObjectId
import todaysDateAsLong
import kotlinx.coroutines.runBlocking
import org.w3c.dom.Document
import javax.management.Query.eq


fun connectToRealmServer()  {
    // Replace the placeholders with your credentials and hostname
    val uri = "mongodb+srv://OptimalHealth:<password>@atlascluster.j1c9yxd.mongodb.net/?retryWrites=true&w=majority&appName=AtlasCluster"

    val mongoClient = MongoClient.create(uri)
    val database = mongoClient.getDatabase("sample_mflix")
    val collection = database.getCollection<Document>("movies")
    runBlocking {
        val doc = collection.find(eq("title", "Back to the Future")).firstOrNull()
        if (doc != null) {
            println(doc.toJson())
        } else {
            println("No matching documents found.")
        }
    }
    mongoClient.close()
}

I appreciate the reply.

It looks like I don’t need MongoClient.create() at all using the example code from the link you provided (https://www.mongodb.com/docs/atlas/device-sdks/sdk/kotlin/sync/add-sync-to-app/)

I’ll have to work with this as it appears there is a good bit of difference in how things are handled. For example, are Realms still opened and closed as before, etc.

Hopefully I’ll find the answers there