Returning the latest version of a document in elasticsearch

Question

I am in need of some help with returning only the latest version of the documents that I have indexed in elasticsearch.

My documents have a field called version (for internal system versioning) and I index a new document every time there is an update made and increment the version field for the new document

How would I query the index so that it only returns the the latest version out of n amount, where "id": n"

EDIT

The documents that are being versioned have an id with .n version number appended at the end and I want to return the latest version of each of these within an index using the version field

Answer 1

So each time a new document is added the version field increments by 1 right.

Then version with maximum value would be the latest version. You can use max aggregation to get that.

{
    "aggs" : {
        "latest" : { "max" : { "field" : "version" } }
    }
}

Answer 2

I figured out a work around. I had to add a bool isLatestVersion Property onto my object and I do a query that filters on that.