How to update value of specific embedded document, inside an array, of a specific document in MongoDB?

Question

I have the following structure in my document:

{
  _id : ObjectId(\"43jh4j343j4j\"), 
  array : [
            { 
              _arrayId : ObjectId(\"dsd87ds         


        

Answer 1

Seeing as none of the answers actually explain how to do this a) in Java and b) for multiple fields in a nested array item, here is the solution for mongo-java-driver 3.12.3.

import com.mongodb.client.MongoCollection;
import com.mongodb.client.model.Filters;
import com.mongodb.client.model.Updates;
import org.bson.Document;
import org.bson.types.ObjectId;

MongoClient mongoClient = MongoClients.create(...);
MongoDatabase db = mongoClient.getDatabase("testDb");
MongoCollection collection = db.getCollection("testCollection");
collection.updateOne(
    Filters.and(
            Filters.eq("_id", new ObjectId("43jh4j343j4j")),
            Filters.eq("array._arrayId", new ObjectId("dsd87dsa9d87s9d7"))
    ),
    Updates.combine(
            Updates.set("array.$.someField", "new value 1"),
            Updates.set("array.$.someField2", "new value 2")
    )
);

This thread has helped me towards the right solution, but I had to do more research for the full solution, so hoping that someone else will benefit from my answer too.