Any way to get last changed timestamp for a dataset?

[matt-deboer]

Question: is there currently any method to get the last changed timestamp for a data set?

By "last change", I mean a value that is updated whenever anything changes about the data set, including annotations added/removed/modified.

[jsbroks]

No there is not. Whats the reason for needing this?
You could write a query for the mongodb

[matt-deboer]

My goal is to watch for changes to a dataset, and when they occur, export the coco.json and convert it back into the dataset's original format. This is to support updates to annotations being reflected back to the filesystem in their original format as quickly as possible, without having to perform manual export and conversion via the UI.

Currently, I'm just pulling the /annotation/ endpoint on an interval, and taking a sha256 of the contents to compare; it works okay, but is not the most efficient.

From a brief bit of research, it seems like you'd have to store a last_modified timestamp field on the annotation and dataset documents to support this