How do you check whether a run was part of a backfill?

[sryza]

Sourced from slack: https://dagster.slack.com/archives/C01U954MEER/p1693320482816869.

Hi. Is there an option to check whether an asset run was triggered as part of a backfill?

[sryza]

Runs that were triggered as part of a backfill will be assigned a backfill tag that includes the backfill ID. Here's an example of one displayed on the Runs page:

If you have a DagsterRun object that you've fetched from the instance, you can inspect its tags attribute. You can also inspect run tags using the DagsterInstance.get_run_tags method.

[nrsmac]

hi @sryza -- would you mind providing an example of accessing this tag from an AssetExecutionContext? Can't seem to figure it out from the API Reference.

[sryza]

context.run.tags should get it for you