On a similar tip for PHP, check out my library Flywheel:
https://github.com/jamesmoss/flywheel
It's no way near as powerful as BlitzDB but I'm slowly adding features to it.
Re:LowDB – A flat JSON file database
by ShinyCyril on Friday August 22, 2014 @05:35AM
(#8211437)
I've been using TinyDB[1] on Python for a little project - it seems to offer similar functionality.
https://github.com/adewes/blitzdb
It's a serverless, flat-file, document-oriented database which supports indexing and transactions and comes with a built-in ORM layer and a rich query language modeled after MongoDB.