Question
Securities and Futures Commission
HK
Last activity: 28 Aug 2017 6:25 EDT
UnmodifiableProperty exception in pyInvokeRESTConnector
I created a data page with a Connect REST as the data source. The connector calls on one of the Pega API (api/vi/cases/{ID}) to get the case details from another application. When running the data page (or the use case itself), I am getting an UnmodifiableProperty exception in the activity Rule-Connect-REST pyInvokeRESTConnector:
com.pega.pegarules.pub.services.InboundMappingException: Error mapping incoming response to .response_GET: com.pega.pegarules.pub.clipboard.UnmodifiablePropertyException: The page or property D9a844e5a_caae_4902_b4bd_8da4194bfeae.response_GET.pxObjClass is unmodifiable. Calling method: com.pega.pegarules.data.internal.clipboard.ClipboardPropertyImpl.setValue(Object) Details: property is reserved. CurrentValue: SFC-FW-SCMFW-Int-CCS-CCSDetails DesiredValue: Pega-API-CaseManagement-Case
Has anyone experienced the same problem?
The access group of the API service package has been changed to the application access group (with role PegaRULES:PegaAPI added) and I have also removed authentication. Any advice would be greatly appreciated.
Please note that we are using Pega 7.2.2.
Thanks!
Raymond
Accepted Solution
Securities and Futures Commission
HK
Hi Mahesh,
Thank you for responding. The problem is that there is no step that explicitly sets the value of the pxObjClass so this is all happening out of the box.
I investigated further and found out that the exception only happens when we map the response to json (im referring to the response tab of the GET method in the Methods tab of the Connect REST rule). As a workaround, instead of mapping to json directly, I map the response to the clipboard first and then do some post processing to convert the json string that I have to proper property values.
Pegasystems Inc.
US
Hi Raymond,
Basically, this exception only comes up when the target location already has pxObjClass set and the current operation is trying to set the same again. In such cases, if the values are not same, this error is thrown from Engine.
In your case it is having this values,
CurrentValue: SFC-FW-SCMFW-Int-CCS-CCSDetails DesiredValue: Pega-API-CaseManagement-Case
Hope this information might be helpful to investigate further.
Regards
Mahesh
Accepted Solution
Securities and Futures Commission
HK
Hi Mahesh,
Thank you for responding. The problem is that there is no step that explicitly sets the value of the pxObjClass so this is all happening out of the box.
I investigated further and found out that the exception only happens when we map the response to json (im referring to the response tab of the GET method in the Methods tab of the Connect REST rule). As a workaround, instead of mapping to json directly, I map the response to the clipboard first and then do some post processing to convert the json string that I have to proper property values.
Pegasystems Inc.
US
Hi Raymond,
Thanks for sharing your investigation with us. After my further research came to know the below information which can clear our doubt,
We cannot deserialize pxObjClass with the integration deserializer. If a sample containing pxObjClass is provided to the REST wizard, the generated data model renames the property to "ppxObjClass" on the clipboard side. This technically does not let you set the pxObjClass.
If you forcefully specify pxObjClass in the JSON at runtime, the api fails with the following error:
Hi Raymond,
Thanks for sharing your investigation with us. After my further research came to know the below information which can clear our doubt,
We cannot deserialize pxObjClass with the integration deserializer. If a sample containing pxObjClass is provided to the REST wizard, the generated data model renames the property to "ppxObjClass" on the clipboard side. This technically does not let you set the pxObjClass.
If you forcefully specify pxObjClass in the JSON at runtime, the api fails with the following error:
com.pega.pegarules.pub.clipboard.UnmodifiablePropertyException: The page or property Target.response_GET.pxObjClass is unmodifiable. Calling method: com.pega.pegarules.data.internal.clipboard.ClipboardPropertyImpl.setValue(Object) Details: property is reserved. CurrentValue: ODAF6K-Int-DSM-RBS DesiredValue: Data-Customer
I found this piece of information after some research at my end, hope it might be helpful to you.
Regards
Mahesh