Elasticsearch-river-mongodb

Hello
i have a question for the syncronization .
My ES collection has 5 colums whereas mongo collection has 3 .
but during the sync the addtional 2 colums in ES is gone.
Any way to neglect the addtional column during sync ?
the other way round is poosible in mongo as filter in river.

--
You received this message because you are subscribed to the Google Groups "elasticsearch" group.
To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/2e040413-fe33-4b48-bf89-0e0ad3a680a4%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.