How To Fix SADL_GTK_GEN015 - Exposure of entity &1 without primary key is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GTK_GEN - SADL GTK Generation Messages

• Message number: 015

• Message text: Exposure of entity &1 without primary key is not possible

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_GTK_GEN015 - Exposure of entity &1 without primary key is not possible ?

  The SAP error message SADL_GTK_GEN015 indicates that there is an attempt to expose an entity that does not have a primary key defined. In the context of SAP, this typically occurs when working with the SAP Gateway or when trying to create a service that exposes a data model entity without a unique identifier.
  
  Cause:
  
  Missing Primary Key: The entity you are trying to expose does not have a primary key defined in the underlying data model. Every entity in a service must have a unique identifier to ensure that each record can be uniquely identified and manipulated.
  Incorrect Data Model Configuration: The data model may not be correctly configured to include a primary key, or the primary key may not be properly defined in the underlying database table or CDS view.
  Inconsistent Metadata: There may be inconsistencies in the metadata definitions that prevent the system from recognizing the primary key.
  
  
  Solution:
  
  
  Define a Primary Key:
  
  Go