How To Fix SADL_GW_DT_CDS014 - Transient field &1 requires the annotation '@ObjectModel.readOnly'.

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW_DT_CDS - Messages CDS Checks

• Message number: 014

• Message text: Transient field &1 requires the annotation '@ObjectModel.readOnly'.

What causes this issue?

In the consumption CDS view, a transient field can only be used in
read-only mode.

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?

Add the annotation '@ObjectModel.readOnly:true' to the transient field
in the CDS view.

Procedure for System Administrators

Contact the corresponding developer of the CDS view to correct the
error.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_GW_DT_CDS014 - Transient field &1 requires the annotation '@ObjectModel.readOnly'. ?

  The SAP error message SADL_GW_DT_CDS014 indicates that there is a transient field in your Core Data Services (CDS) view that requires the annotation @ObjectModel.readOnly. This error typically arises when you are trying to expose a transient field in a CDS view that is not marked as read-only, which is necessary for transient fields since they are not meant to be persisted in the database.
  Cause:
  
  Transient Field: The field in question is defined as a transient field in your CDS view. Transient fields are calculated or derived fields that do not have a corresponding database column.
  Missing Annotation: The transient field does not have the required annotation @ObjectModel.readOnly, which indicates that the field is read-only and cannot be modified.
  
  Solution:
  To resolve this error, you need to add the @ObjectModel.readOnly annotation to the transient field in your CDS view definition. Here’s how you can do it:
  
  
  Open the CDS View: Access the CDS view in the ABAP Development Tools (ADT) or the relevant development environment.
  
  
  Modify the Field Definition: Locate the definition of the transient field that is causing the error.
  
  
  Add the Annotation: Add the @ObjectModel.readOnly annotation to the transient field. For example:
  define view Z_MY_CDS_VIEW
  as select from my_table
  {
      key field1,
      field2,
      @ObjectModel.readOnly: true
      field_transient as transient_field
  }
  
  
  Activate the CDS View: After making the changes, activate the CDS view to apply the modifications.
  
  
  Related Information:
  
  Transient Fields: These are fields that are calculated at runtime and do not have a physical representation in the database. They are often used for derived values or calculations based on other fields.
  Annotations: Annotations in CDS views provide metadata that can influence the behavior of the view, such as read-only status, UI behavior, and more.
  SAP Documentation: For more detailed information, refer to the official SAP documentation on CDS views and annotations, which provides guidelines on how to define and use annotations effectively.
  
  By following these steps, you should be able to resolve the error and successfully use the transient field in your CDS view.