How to create multiple 'aggregate' facts on a 'parent' object calculated from child objects (composition)

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Feature
Clarity
Needs clarification
Activity status
Stale
Tech stack
javascript
Domain
backend

Research direction

Start by reviewing the repository's existing examples and the requirements listed here: parent facts calculated from composed children, including filtered or unfiltered counts and sums. Determine whether the rules engine already supports this pattern; done requires a concrete example or a narrowed implementation proposal that defines the supported aggregate behavior.

Written by the indexing model from the issue text.

Description

I have object(s) that will introduce facts that also have 'child' objects (composition). There will be multiple facts that are aggregate values on the parent that are calculated from the 'children.'

Typically these aggregate fact on the parent will follow one of the following patterns:

  • count of children matching a filter (or all)
  • sum of children matching a filter (or all)

I didn't see anything like that in the examples. It would be great if it could be added!

Dominant language
JavaScript
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