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  1. Java Driver
  2. JAVA-5237

Kotlin driver : "Invalid $set :: caused by :: an empty object is not a valid value"

    • Type: Icon: Bug Bug
    • Resolution: Won't Fix
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: 4.11.0
    • Component/s: BSON, Codecs, Kotlin
    • None
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      1. What would you like to communicate to the user about this feature?
      2. Would you like the user to see examples of the syntax and/or executable code and its output?
      3. Which versions of the driver/connector does this apply to?

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      1. What would you like to communicate to the user about this feature? 2. Would you like the user to see examples of the syntax and/or executable code and its output? 3. Which versions of the driver/connector does this apply to?

      Summary

      Hello,

      I’m using :

      -> Kotlin driver => org.mongodb:mongodb-driver-kotlin-sync:4.11.0
      (the same issue exists in 4.10.2 too)

      -> MongoDB Atlas Dedicated Cluster M10 v6.1

      How to Reproduce

      Here is a very simple code to reproduce (replace XXX, YYY, ZZZ with your values)

      import com.mongodb.client.model.Filters
      import com.mongodb.client.model.UpdateOptions
      import com.mongodb.client.model.Updates
      import com.mongodb.kotlin.client.MongoClient
      import org.bson.Document
      import org.bson.conversions.Bson
      
      fun main(args: Array<String>) {
        val uri = "XXXXXXXXX"
        val databaseName = "YYYYYYYY"
        val collectionName = "ZZZZZZZ"
        val mongoClient = MongoClient.create(uri)
        val db = mongoClient.getDatabase(databaseName)
        val collection = db.getCollection<Document>(collectionName)
      
        val filter = Filters.eq("id", "1234")
      
        val up = Updates.set("myfield", emptyMap<String,String>())
        collection.updateOne(filter, up, UpdateOptions().upsert(true)) // OK
      
        val upList = listOf<Bson>(up)
        collection.updateOne(filter, upList) // FAILED
      } 

      Additional Background

      Doing the same in mongosh :

       

      db.mycoll.updateOne({"id": "1234"}, {$set: { "myfield": {} } })

      => OK

      db.mycoll.updateOne({"id": "1234"}, [{$set: { "myfield": {} } }])

      => FAILED

      but (with $literal)

      db.mycoll.updateOne({"id": "1234"}, [{$set: { "myfield": {$literal: {}} } }])

      => OK

       

      Here is the log of the MongoDB Kotlin driver sent command:

      Command: {"update": "mycoll", "ordered": true, "$db": "testbug", "lsid": {"id": {"$binary": {"base64": "icFsmZQIQi+kINYdFsc5BA==", "subType": "04"}}}, "updates": [{"q": {"id": "1234"}, "u": [{"$set": {"myfield": {}}}]}]}

      It seems it is missing the $literal

       

      Here is the exception trace

      Exception in thread "main" com.mongodb.MongoWriteException: Write operation error on server localhost:27017. Write error: WriteError{code=40180, message='Invalid $set :: caused by :: an empty object is not a valid value. Found empty object at path myfield', details={}}. at com.mongodb.client.internal.MongoCollectionImpl.executeSingleWriteRequest(MongoCollectionImpl.java:1093) at com.mongodb.client.internal.MongoCollectionImpl.executeUpdate(MongoCollectionImpl.java:1076) at com.mongodb.client.internal.MongoCollectionImpl.updateOne(MongoCollectionImpl.java:609) at com.mongodb.kotlin.client.MongoCollection.updateOne(MongoCollection.kt:652) at com.mongodb.kotlin.client.MongoCollection.updateOne$default(MongoCollection.kt:651) at app.moovago.TestbugKt.main(testbug.kt:27)
      
      

       

      Thanks for your help!

            Assignee:
            ross@mongodb.com Ross Lawley
            Reporter:
            sebastien.perochon@mobiquite.fr Sébastien Pérochon
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            3 Start watching this issue

              Created:
              Updated:
              Resolved: