Method 'QUERY_CUSTOM_ATTRIBUTES' not implemented in data provider class.

[Former Member]

Dear Experts,

in the extend CA_FIORI_INBOX app, we are getting the below error message.

Method 'QUERY_CUSTOM_ATTRIBUTES' not implemented in data provider class.

What is the best solution to avoid this error ??

thanks,

Shinto Joseph

[LeonardoGomez]

Hi Shinto,

I came across the same issue. I believe is a standard code error but I found a workaround.This happens because TASKPROCESSING service V2 implements the custom attribute functionality which is not present in V1. When you create your enhancement service, your new service will be V1. Then at runtime, the system appears to use your enhacement with V1 of TASKPROCESSING, instead of V2.

An easy way to fix this is to create a new service version for your enhancement service, so it has a V2. You don't need to create another model, you just create the service and assign it to the same existing model. If you then work with the V2 of your service the system will call V2 of TASKPROCESSING and the custom attribute functionality will be implemented.

Kind regards,

Leonardo.

[SB9]

Even if I extend the V2 Task Processing Service but I still face the same problem. Following is the definition of my service which extends upon version 2 of /IWPGW/TASKPROCESSING

And I am still getting the error - "Method 'QUERY_CUSTOM_ATTRIBUTES' not implemented in data provider class.

[LeonardoGomez]

Sorry, that was not what I meant.

Go to SPRO --> SAP Netweaver --> Gateway Service Enablement --> Backend OData Channel --> Service Development for Backend OData Channel --> Maintain Service.

You have to create a version 2 of your service exactly the same as your version 1. You will click on Assign Model and assign it to the version 1 of your model.

Then go to /IWFND/MAINT_SERVICE and bring your new version of the service. Remember to use the v=2 suffix in your app when calling the oData service.

That should work.

Regards,

Leonardo.

[cmetz]

This message was moderated.

[SB9]

This message was moderated.

[cmetz]

I just redefined this method (so that it is empty) in SEGW. Solved my problem, cause i didnt need this.

[SB9]

Thanks Christoph. I redefined the method and it solved the issue.

[masa_139]

Hi Shinto,

It there any code in the method 'QUERY_CUSTOM_ATTRIBUTES'?

Regards,

Masa / SAP Technology RIG

[Former Member]

Dear Masa,

We have just redefined the TASKPROCESSING, V2 oData Service, data is coming for TaskCollection and ScenarioCollection, but when we try from launch pad we are getting this error. because in launchpad its using $expand=CustomAttributes,

or

how can I comment that expand in an extended CA_FIORI_INBOX application ?

Thanks,

Shinto

[masa_139]

Hi Shinto,

Is $expand=CustomAttributes also called in the standard app?

Regards,

Masa / SAP Technology RIG

[Former Member]

Yes its called in standard app as well.

We haven't changed anything in the extended app.

[masa_139]

Hi Shinto,

Please compare the method code in your extended one with the standard one.

Regards,

Masa / SAP Technology RIG