Validation of batch inserts in mongo

Performing a batch insert like

@state.collection.insert batch

bypasses Activerecord and so doesn't allow for validation functions and other callbacks to be run. Is there a workaround to this? I found a gem for doing this in MySQL/Postgres

But I'm surprised there doesn't seem to be a gem or even much discussion for the issue in Mongo since it seems like a signficant problem for any application dealing with alot of data.