Camunda tutorial help - tickbox issue - Unknown property used in expression: ${approved}. Cause: Cannot resolve identifier 'approved'

mikethornndph · December 1, 2021, 10:30am

Hi,

I’m working through the tutorial (Add Gateways to the Process (5/6) | docs.camunda.org) and have hit an issue with the boolean “approved” variable.

The flow chart is set up as per the tutorial, using the expression ${!approved} for the “no” option:

If I run the process and select the tickbox “Approve” in the user task, the process runs to complete. However, if I leave the tickbox unselected (ie not approving), I get the message:

An error happened while submitting the task form : Cannot submit task form 74dc5eb0-5290-11ec-8d87-7c76354947cd: Unknown property used in expression: ${approved}. Cause: Cannot resolve identifier ‘approved’

It’s as if the approved variable is only created if I select the tickbox.

I’ve been through this a few times and cannot see what is wrong. Any help is gratefully received.

Mike

Niall · December 1, 2021, 11:14am

Can you upload the model itself?

mikethornndph · December 1, 2021, 11:16am

Sure thing - should be attached:
payment.bpmn (7.1 KB)

Niall · December 1, 2021, 12:58pm

Can you also upload the form you’re using for the approve payment task?

mikethornndph · December 1, 2021, 1:11pm

Please find it attached:
payment.form (517 Bytes)

Niall · December 1, 2021, 1:22pm

Hi @mikethornndph

I looked into this and it looks like a bug with the way the variables are created on tick boxes.
I’ll create a bug ticket for it (if one doesn’t already exist) in the mean time - if you click the tickbox twice (on and back off) it should work.

Thanks for helping us find this.

mikethornndph · December 1, 2021, 1:24pm

@Niall Ah, okay, glad to have been of services

Many thanks for all your help over the last couple of days. On a related thought, I’m investigating tools we might use for our data-pipelines. Is there a route/forum/email address that I can address a few questions to please?

Niall · December 1, 2021, 1:26pm

Your best bet is to send us a request here: Contact Us - Camunda
Then you can get someone dedicated to helping you out.

mikethornndph · December 1, 2021, 1:26pm

Great, thanks very much.

Niall · December 1, 2021, 3:05pm

It looks like this has already been reported, you can take a look at it here:

github.com/camunda/camunda-modeler

Unchecked checkbox not mapped to process variable

opened 09:07AM - 12 Nov 21 UTC

mschoe

bug backlog

__Describe the Bug__ An unchecked checkbox does not create the mapped variabl…e __Steps to Reproduce__ **Scenario a**: I create my form in the modeler form-builder. ``` { "schemaVersion": 2, "components": [ { "label": "Checkbox", "type": "checkbox", "id": "Field_1l6w7am", "key": "chk_variable" } ], "type": "default", "id": "Form_1mnbkj6" } ``` // when I complete a task with an unchecked checkbox // then the mapped process variable `chk_variable` will **not** be created. **Scenario b**: I create my form as html file ``` <input type="checkbox" id="resolve-chk" cam-variable-name="chk_variable" cam-variable-type="Boolean" /> ``` // when I complete a task with an unchecked checkbox // then the mapped process variable `chk_variable` will be created and the value is false. **Scenario c**: I create the checkbox in the properties panel forms tab. ``` <camunda:formData> <camunda:formField id="chk_variable" label="Checkbox" type="boolean" defaultValue="false" /> </camunda:formData> ``` // when I complete a task with unchecked checkbox // then the mapped process variable `chk_variable` will be created and the value is false. __Expected Behavior__ The variable will always be mapped. I assume that in scenario a the checkbox value is null. So using a defaultValue field like in the properties panel forms tab could already solve the problem __Environment__ - Camunda Modeler Version: [4.11.1] ---- Depends on https://github.com/bpmn-io/form-js/issues/190

system · January 30, 2024, 1:36pm