BulkUpdate Operation?

[Tulio Domingos]

Hi there, 

I'm looking to update multiple documents in a collection with some sort of upsert flag. Similar to MongoDB's updateMany operation I guess: https://docs.mongodb.com/manual/reference/method/db.collection.updateMany/

I checked out "bulkInsert" but that only inserts if no match is found: http://reactivemongo.org/releases/0.11/api/index.html#reactivemongo.api.collections.GenericCollection@bulkInsert(ordered:Boolean)(documents:GenericCollection.this.ImplicitlyDocumentProducer*)(implicitec:scala.concurrent.ExecutionContext):scala.concurrent.Future[reactivemongo.api.commands.MultiBulkWriteResult]

The problem is that I need to insert docs either way (overwriting existing docs if found), the only way I found possible so far is to iterate over every single one of them programatically and upsert each of them individually..

Wondering if there is a better way of doing this? 

Thanks in advance  

 

 

[Cédric Chantepie]

Hi,

If you have a look at the .update operation, you can see a multi flag.
When true, the update is applied on all the documents matching the given selector.

[Tulio Domingos]

Thanks for the prompt reply! 

Should the selector then be a list of BSON Documents with ID fields? 

val selector = List(BSONDocument("_id" -> "xxx"), ...)

And the modifier, the collection of objects (with implicit reader and writers)? 

Maybe I'm missing something but it doesn't make much sense to me, basically I just want to insert a bunch of objects, and while doing so, update the ones that match on the _id field..  

Thanks

[Cédric Chantepie]

The update command provided by MongoDB expected BSON documents for both the selector/filter and the update operation.
I suggest you first try manually using the MongoShell, to understand the MongoDB behaviour, then you can do the same using ReactiveMongo.

[Tulio Domingos]

I'll take a look at it, thanks Cédric!