Converting an AssetSelection to a list of AssetKeys

[cody-scott]

Hello, looking for some guidance on how to convert an AssetSelection, with additional parameters such as downstream, to a list of AssetKeys to be passed to a RunRequest in a sensor.

Roughly I'd like to have a single sensor that checks a list of Assets to materialize, then generate a run request for the subset of assets. So, I have 5 assets checked by the sensor, but only one or two might trigger on any given evaluation.

The sticking point I am having is the RunRequest needs a list of AssetKeys, but the AssetSelection doesn't provide that precise structure.

How does one convert an AssetSelection to a list of AssetKeys to be passed to a RunRequest.

Ultimately I would just like to switch to Automation Conditions and have this only need to trigger the single AssetKey at the root, but we're not there yet unfortunately.