How To Fix SADL_GW_DT_CDS021 - Key fields of association &2 are missing in CDS view &1.

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW_DT_CDS - Messages CDS Checks

• Message number: 021

• Message text: Key fields of association &2 are missing in CDS view &1.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_GW_DT_CDS021 - Key fields of association &2 are missing in CDS view &1. ?

  The SAP error message SADL_GW_DT_CDS021 indicates that there is an issue with the key fields of an association in a Core Data Services (CDS) view. Specifically, it means that the key fields required for the association are not present in the CDS view definition.
  Cause:
  This error typically occurs when:
  
  The CDS view is defined with an association that requires certain key fields to be present, but those fields are missing in the view.
  The association is not properly defined, or the underlying data model does not align with the expected structure.
  There may be a mismatch between the key fields defined in the associated entity and those present in the CDS view.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the CDS View Definition:
  
  Open the CDS view in the ABAP Development Tools (ADT) or the relevant transaction (e.g., SE11).
  Verify that the key fields required for the association are included in the SELECT statement of the CDS view.
  
  
  
  Review the Association Definition:
  
  Ensure that the association is correctly defined in the CDS view. Check the @ObjectModel.association annotation and confirm that it points to the correct target entity.
  Make sure that the key fields specified in the association match the key fields in the target entity.
  
  
  
  Add Missing Key Fields:
  
  If the key fields are indeed missing, add them to the CDS view. Ensure that they are part of the SELECT list and are correctly defined as key fields.
  
  
  
  Check Data Model:
  
  Review the underlying data model to ensure that the associations and key fields are correctly defined in the related entities.
  
  
  
  Activate the CDS View:
  
  After making the necessary changes, activate the CDS view to ensure that the changes take effect.
  
  
  
  Test the Changes:
  
  Test the CDS view to confirm that the error has been resolved and that the association works as expected.
  
  
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) is a framework for defining and consuming semantically rich data models in SAP. It allows for the creation of views that can be consumed by various applications, including SAP Fiori apps.
  Associations: In CDS, associations are used to define relationships between different entities. They are similar to foreign keys in traditional database design.
  Key Fields: Key fields are essential for uniquely identifying records in a database table or view. In the context of associations, they are necessary for establishing relationships between entities.
  
  If you continue to face issues after following these steps, consider consulting SAP documentation or reaching out to SAP support for further assistance.