add functionality of Upsert

Hi,
Sometime we want to update the document if that is already inserted otherwise we will insert a new one for this like mongo give us **Upsert:true** option, so suppose i am using Rest-Hapi then how can i achieve the same thing via Rest-Hapi, i mean is there a way to do this.

Thanks

Start by reviewing Rest-Hapi's generated CRUD behavior and how its MongoDB integration handles create and update operations. The issue names no files or tests, so first identify the relevant entry points and establish tests showing that an existing document is updated and a missing document is inserted.

Written by the indexing model from the issue text.