How To Fix ESH_ENG_CDSVAL_ES004 - 'expand' must be annotated at an association

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_ENG_CDSVAL_ES - ES-CDS/ABAP: Validation of domain @EnterpriseSearch

• Message number: 004

• Message text: 'expand' must be annotated at an association

What causes this issue?

@EnterpriseSearch.expand can be annotated at an association only.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Remove the annotation wherever it does not relate to an association.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ESH_ENG_CDSVAL_ES004 - 'expand' must be annotated at an association ?

  The SAP error message ESH_ENG_CDSVAL_ES004 indicates that there is an issue with the way an association is defined in a Core Data Services (CDS) view. Specifically, the error message states that the expand annotation must be applied to an association in the CDS view definition.
  Cause:
  This error typically occurs when:
  
  You have defined an association in your CDS view but have not annotated it with the @ObjectModel.expand annotation.
  The CDS view is expected to allow for the expansion of the associated entity, but the necessary annotation is missing.
  
  Solution:
  To resolve this error, you need to ensure that the association in your CDS view is properly annotated. Here’s how you can do that:
  
  
  Locate the Association: Find the association in your CDS view definition that is causing the error.
  
  
  Add the @ObjectModel.expand Annotation: You need to add the @ObjectModel.expand annotation to the association. Here’s an example of how to do this:
  define view ZMy_CDS_View
  as select from my_table
  association [0..*] to another_table as _AnotherTable
  on my_table.key = _AnotherTable.key
  {
      key my_table.key,
      my_table.field1,
      my_table.field2,
      @ObjectModel.expand: true
      _AnotherTable
  }
  
  
  Activate the CDS View: After making the changes, activate the CDS view to ensure that the changes take effect.
  
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) are a way to define semantic data models in SAP. They allow for the definition of complex data models and relationships between entities.
  Annotations: Annotations in CDS views provide metadata that can influence the behavior of the view, such as how it is consumed in UI applications or how it interacts with other services.
  Documentation: For more detailed information, refer to the SAP Help Portal or the official SAP documentation on Core Data Services and annotations.
  
  By following these steps, you should be able to resolve the error and properly define the association in your CDS view.