Using assign in a routing rule using XML

Question

Question

Ewan Whyte · 23 hr ago

#Business Rules #InterSystems IRIS for Health #InterSystems IRIS

I'm trying to use the assign option within a ruleset. I can trace the value with no issues but when I try to assign the same value to a variable of Namespace I get an error.
Ideally I would like to use a variable instead of repeating the Piece repeatedly throughout the rules.

Ruleset

And this is the error that I am getting.

ERROR <Ens>ErrException: <PROPERTY DOES NOT EXIST>zevaluateRuleDefinition+14^SFT.RoutingRules.AlertManCreationRule.1 *Namespace,Ens.Alerting.Context.CreateAlert -- logged as '-' number - @' set pContext.Namespace=##class(Ens.Rule.FunctionSet).Piece((pContext.AlertRequest.SourceConfigName),("|"))'

Can someone advise on where and how I can add that Namespace property so that I can assign it a value? Or have I got the wrong idea of the use of assign.

Thank you.

Product version: IRIS 2022.1

$ZV: IRIS for Windows (x86-64) 2022.1.2 (Build 574U) Fri Jan 13 2023 15:00:26 EST

Discussion (4)3

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Laura Blázquez ... · 22 hr ago

That property doesn't exists in the class you are using as context. But in the rule editor, General tab, you have a section called Temporary Variables, you can create there, and reference it with @<name> in the rule. In your case, your assing will be:

assing @Namespace = Piece(AlertRequest.SourceConfigName,"|")

Here is the documentation:

Temporary Variables

User-specified temporary variables, which you can use in the rule definition. The variables must be separated by commas, for example:
FreeShippingValue,ShipMethod,PremierMember
You can reference a temporary variable in a rule definition by preceding the variable name with the @ (at sign) character, for example, @FreeShippingValue. You cannot use temporary variables outside the rule definition. To pass information to a transformation, you can instead use the RuleUserData property. For more information, see Selecting the Transformation and Target of a Send Action.

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score 0 · Answer 1 · 2025-05-09T04:18:31-04:00

Ewan Whyte · 2 hr ago

Thank you Laura, I had never used those before but it worked perfectly for what I needed.

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score 0 · Answer 2 · 2025-05-08T08:14:42-04:00

~~You cannot assign to arbitrary variable in rules.~~ (edited, in fact, you can see other posts! 🙂)

To store some temporary data you can assign it to aux.RuleActionUserData

score 0 · Answer 3 · 2025-05-08T08:17:11-04:00

Assign values to properties in the business process execution context. Someone will correct me if I am mistaken, but you need to also add that variable in the Rules General tab under Temporary Variables.