How To Fix SADL_GW_DT_CDS056 - Field &1 must be exposed because it is used in annotation &2 at field &3.

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW_DT_CDS - Messages CDS Checks

• Message number: 056

• Message text: Field &1 must be exposed because it is used in annotation &2 at field &3.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_GW_DT_CDS056 - Field &1 must be exposed because it is used in annotation &2 at field &3. ?

  The SAP error message SADL_GW_DT_CDS056 indicates that a field in your Core Data Services (CDS) view must be exposed because it is referenced in an annotation. This typically occurs when you are using annotations to define certain behaviors or properties of your CDS view, such as UI annotations for Fiori applications, and the field in question is not included in the output of the CDS view.
  Cause:
  The error arises when:
  
  A field is referenced in an annotation (e.g., @UI.lineItem, @UI.selectionField, etc.) but is not included in the list of fields that are exposed in the CDS view.
  The CDS view is expected to provide certain fields for UI rendering or other purposes, but those fields are not part of the SELECT statement.
  
  Solution:
  To resolve this error, you need to ensure that the field mentioned in the error message is included in the CDS view. Here are the steps to do that:
  
  
  Identify the Field: Check the error message for the specific field (&1) and the annotation (&2) that is causing the issue.
  
  
  Modify the CDS View:
  
  Open the CDS view definition in the ABAP Development Tools (ADT) or the relevant transaction (e.g., SE11, SE80).
  Ensure that the field is included in the SELECT statement of the CDS view. If it is not, add it to the list of selected fields.
  
  Example:
  define view Z_MY_CDS_VIEW
  as select from my_table
  {
      key field1,
      field2,
      field3,  // Ensure this field is included
      ...
  }
  
  
  Check Annotations: Review the annotations in your CDS view to ensure they are correctly defined and that all referenced fields are included in the SELECT statement.
  
  
  Activate the CDS View: After making the necessary changes, activate the CDS view.
  
  
  Test the Changes: Run the application or transaction that was previously generating the error to confirm that the issue has been resolved.
  
  
  Related Information:
  
  Annotations: Annotations in CDS views are used to enhance the metadata and provide additional information for UI frameworks, such as Fiori. Common annotations include @UI.lineItem, @UI.selectionField, and others.
  CDS Views: Core Data Services (CDS) is a framework for defining semantically rich data models in SAP. CDS views can be used to create complex queries and expose data to various applications.
  Debugging: If you continue to encounter issues, consider using the ABAP debugger or transaction codes like SE11 or SE80 to analyze the CDS view and its annotations in detail.
  
  By following these steps, you should be able to resolve the SADL_GW_DT_CDS056 error and ensure that your CDS view is correctly configured for use with the specified annotations.