How To Fix SADL_GW_DT_CDS031 - CDS view &1: Association to child &2 is missing.

SAP Error Message - Details

• Message type: E = Error

• Message class: SADL_GW_DT_CDS - Messages CDS Checks

• Message number: 031

• Message text: CDS view &1: Association to child &2 is missing.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SADL_GW_DT_CDS031 - CDS view &1: Association to child &2 is missing. ?

  The SAP error message SADL_GW_DT_CDS031 indicates that there is an issue with a Core Data Services (CDS) view where an association to a child entity is missing. This typically occurs when the CDS view is trying to reference a child entity that is not properly defined or linked in the CDS view's structure.
  Cause:
  
  Missing Association: The CDS view is expected to have an association to a child entity, but it is not defined in the view.
  Incorrect Definition: The association might be incorrectly defined or the child entity might not exist in the context of the CDS view.
  Modeling Errors: There could be errors in the underlying data model or in the way the associations are set up in the CDS view.
  
  Solution:
  
  
  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 association to the child entity is correctly defined. Ensure that the association name and the target entity are correct.
  
  
  
  Define the Missing Association:
  
  If the association is missing, you need to define it. Use the define association syntax in your CDS view to create the necessary link to the child entity.
  
  Example:
  define view Z_MY_CDS_VIEW
  as select from my_table
  association [0..*] to Z_CHILD_ENTITY as _Child
  on $projection.key_field = _Child.key_field
  {
      key field1,
      field2,
      ...
  }
  
  
  Check the Child Entity:
  
  Ensure that the child entity (the target of the association) is correctly defined and active in the system. If it is a separate CDS view, make sure it is correctly implemented.
  
  
  
  Activate the CDS View:
  
  After making changes, activate the CDS view to ensure that the changes take effect.
  
  
  
  Test the CDS View:
  
  Execute the CDS view to verify that the error is resolved and that the association works as expected.
  
  
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) is a framework for defining semantically rich data models in SAP. It allows for the creation of views that can be consumed by various applications.
  Associations: In CDS, associations are used to define relationships between different entities. They are similar to foreign keys in traditional database design.
  SAP Documentation: For more detailed information, refer to the official SAP documentation on CDS views and associations, which provides guidelines and best practices for modeling.
  
  If the issue persists after following these steps, consider checking for any additional dependencies or configurations that might be affecting the CDS view.