Impact Aggregation by Region

[emanuel-schmid]

There should be an easy way to get damages per event and region_id.

There are many ways to implement this, but all of them come with a price on calculation and/or memory. From a discussion on Slack a vague plan emerged to

• introduce an additional method in Impact that provides this kind of aggregation
• introduce an additional argument in the ImpactCalc.impact method that indicates how/whether to persist the aggregation result within the Impact object.

[aleeciu]

• introduce an additional argument in the ImpactCalc.impact method (e.g., at_region_id_event) and the current at_event becomes at_region_id_event.sum(0) or something

[emanuel-schmid]

Er, actually, the case depending replacement of at_event was declined, I'm afraid 😬

[aleeciu]

see proposed addition in #642

[peanutfun]

Resolved by #642