topic Access Parent Attribute in Attribute Rules Questions

Access Parent Attribute

JarredPaquinMC2 — Mon, 30 Mar 2026 18:35:53 GMT

Hello,

I am unsure why my following code isn't working.

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var related = FeatureSetByRelationshipName($feature, "ACProductsGroundwaterSamplingPoints_ACProductsQuarterlySurveyForm")

return first(related)['WellID']

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I am trying to calculate a field in the child table based on the value in the parent table, but it's throwing an error.

Thanks!

Re: Access Parent Attribute

KenBuja — Mon, 30 Mar 2026 19:39:49 GMT

Are you checking whether there are any records in related?

var related = FeatureSetByRelationshipName($feature, "ACProductsGroundwaterSamplingPoints_ACProductsQuarterlySurveyForm"); return IIf(Count(related) > 0, First(related)["WellID"], "No related records");

Re: Access Parent Attribute

JarredPaquinMC2 — Mon, 30 Mar 2026 19:46:21 GMT

No, unfortunately that's not it. When I try to add a related record to the table using FieldMaps, it's still failing to calculate. Unfortunately FieldMaps does not provide very much in the way of error messages.