How To Fix SADL_GW_DT_SB_UI029 - CDS-Entity '&1' does not contain a key field

SADL_GW_DT_SB_UI029 - Overview

• Message type: E = Error

• Message class: SADL_GW_DT_SB_UI - Gateway Service Builder UI Integration for SADL

• Message number: 029

• Message text: CDS-Entity '&1' does not contain a key field

Self-Explanatory Message

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SADL_GW_DT_SB_UI029 - Details

• The SAP error message SADL_GW_DT_SB_UI029 indicates that the Core Data Services (CDS) entity you are trying to use does not contain a key field. This is a common issue when working with CDS views in SAP, especially when they are intended to be exposed as OData services.
  
  Cause:
  
  Missing Key Field: The CDS entity must have at least one key field defined. Key fields are essential for uniquely identifying records in the entity.
  Incorrect Annotations: The annotations that define the key fields may be missing or incorrectly specified in the CDS view.
  View Definition Issues: The underlying SQL or logic in the CDS view may not be correctly set up to include a key field.
  
  
  Solution:
  
  
  Define Key Fields: Ensure that your CDS view includes at least one key field. You can do this by using the @Key annotation in your CDS view definition. For example:
  define view ZMy_CDS_View
  as select from my_table
  {
      key field1,