Verify whether a variable is empty or not, within the sequence flows in Camunda Modeler

When working with a sequenceFlow in a process instance, I need to check a condition that may involve a variable that has not been defined yet. I want the flow to proceed even if the variable is not defined, rather than throwing an ActivitiException.

I have written my condition as follows:

${ A == null || A.a >= B.b }

However, when A is null (not defined), I am unable to proceed :/

Is there a solution to this issue?

Answer №1

One possible solution is to implement an ExecutionListener and set the value at the start of your process to ensure it never becomes Null.

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