ABAP RAP Custom Entity with Parameter not allowed

[Sandra_Rossi]

Hi Gurus,

I have created custom entity and Implemented if_rap_query_provider~select method. Service I created in V4 API.

This custom entity is with NO parameter is working as expected and returning all results.

When I added parameter to this Custom Entity It started giving me below Error ->

Entity 'ZCE_TU_DETAILS': Parameter entity set '$PARAMETER$ZCE_TU_DETAILS' cannot be used for read

I do not know how to test or use this Custom Entity with parameter... please help pointing to any documentation or example...

I have followed below documentation:

https://help.sap.com/docs/abap-cloud/abap-rap/using-parameters-in-unmanaged-query?version=sap_btp 

Please help...

@Ramjeekorada @Ramjee_korada 

Thanks-

[Sandra_Rossi]

Did you find the solution?

[AbhishekSharma]

Nope...

@Andre_Fischer Please help...

[Jan-Trcka]

Hi,

I'm unsure if this is your situation, but when I created CDS with a parameter and linked it to the Service Binding, it made a new EntitySet.

Example:

I have a CDS named "ZPO_Item" with a parameter for the posting date. In the service binding component, it created a new EntitySet named "ZPO_ItemResults." All my communication needs to go to this EntitySet.

In the metadata there still exists the ZPO_Item EntitySet, but the linked EntityType is with the sap:semantics="parameters" and thus cannot be used for direct requests.

[DmitriiBalykov]

Hi there 

I'm sure you have already found the right answer

But in case anyone else gets here after googling the message Entity '&1': Parameter entity set '&2' cannot be used for read

After parametrizing your entity you need to add /Set at the end of the URI

Like, ../SomeName(Par1='value1',Par2='value2') wouldn't work but ../SomeName(Par1='value1',Par2='value2')/Set would

[martinc_mb38]

@DmitriiBalykov Thanks, I found this answer too, that you need to add /Set to the end of the URL. What is the rationale behind this? I have two unmanaged queries implemented in exactly the same way, with the exception that one has a parameter, the other does not. The one without parameter works without '/Set', the one with parameter requires '/Set'. It does not make sense.