Disallow Condition If Sequence Flow Is Not Exclusive or Inclusive Gateway about bpmnlint-plugin-camunda-compat HOT 8 CLOSED

In addition, we consider modeling implicit gateways a bad practice, so even if zeebe will support conditional flows, this rule would still apply as warning or info.

This would be "modeling guidance" then. With this plug-in we strictly validated compatibility for execution.

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Related issue that we do not capture yet (in terms of run-time compatibility):

Conditions must not be empty:

Command 'CREATE' rejected with code 'INVALID_ARGUMENT': Expected to deploy new resources, but encountered the following errors:
'Playground Process.bpmn': - Element: Activity_119f0sp
    - ERROR: Conditional sequence flows are only supported at exclusive or inclusive gateway
- Element: Flow_1f2h1nt > conditionExpression
    - ERROR: Expected expression but found static value ''. An expression must start with '=' (e.g. '=').
[ deploy-error ] 16/5/2023 18:0:38

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Closed via #97.

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Change a flow into a conditional flow.

from bpmnlint-plugin-camunda-compat.

Change a flow into a conditional flow.

Ah! Yeah, that part is a bit confusing. So any sequence flow can have a condition, but only when the source is an activity it must also be rendered as a conditional sequence flow. I guess we need the empty expression to be able to determine that the sequence flow is conditional and to render it as such.

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The rule makes sense, thanks for suggesting it

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Interestingly enough Zeebe does not fail on default flows, only conditional 🙈. This diagram deploys just fine, but makes no sense without condition support:

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• Element: Flow_1f2h1nt > conditionExpression
  • ERROR: Expected expression but found static value ''. An expression must start with '=' (e.g. '=').
    [ deploy-error ] 16/5/2023 18:0:38

How did you end up with an empty expression? The conditionExpression shouldn't exist unless there is a value.

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