How To Fix CFD_REGISTRY_CHECK060 - Association &1 in CDS View &2 must have cardinality [0..1] or [1..1]

SAP Error Message - Details

• Message type: E = Error

• Message class: CFD_REGISTRY_CHECK - Custom Fields: Messages for Registry Check

• Message number: 060

• Message text: Association &1 in CDS View &2 must have cardinality [0..1] or [1..1]

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CFD_REGISTRY_CHECK060 - Association &1 in CDS View &2 must have cardinality [0..1] or [1..1] ?

  The SAP error message CFD_REGISTRY_CHECK060 indicates an issue with the cardinality of an association in a Core Data Services (CDS) view. This error typically arises when the cardinality defined for an association does not meet the expected constraints. Here’s a breakdown of the cause, solution, and related information for this error:
  Cause:
  
  Cardinality Mismatch: The error occurs when the cardinality of an association in the CDS view is defined in a way that does not comply with the expected cardinality constraints. The expected cardinalities are either [0..1] (optional) or [1..1] (mandatory).
  Association Definition: The association might be defined incorrectly in the CDS view, leading to a situation where the system cannot determine how many instances of the associated entity can exist for a given instance of the main entity.
  
  Solution:
  
  
  Review Association Definition: Check the definition of the association in the CDS view. Ensure that the cardinality is set correctly according to the business logic and data model.
  
  If the association should allow for zero or one instance, ensure it is defined as [0..1].
  If the association must always have one instance, define it as [1..1].
  
  Example:
  define association to AnotherEntity
    on AnotherEntity.key = this.key
    cardinality [0..1]  // or [1..1]
  
  
  Check Related Entities: Ensure that the related entity (the one being associated) also has the correct cardinality defined in its own CDS view. The cardinality should be consistent across both views.
  
  
  Test the Changes: After making the necessary adjustments, activate the CDS view and test it to ensure that the error is resolved.
  
  
  Consult Documentation: If you are unsure about the correct cardinality, refer to the SAP documentation or data model guidelines relevant to your specific use case.
  
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) are a way to define semantically rich data models in SAP. Understanding how to define associations and their cardinalities is crucial for effective data modeling.
  Cardinality in Data Modeling: Cardinality defines the relationship between entities in a data model. It specifies how many instances of one entity can be associated with instances of another entity.
  SAP Notes and Community: If the issue persists or if you need further assistance, consider checking SAP Notes or the SAP Community for similar issues and solutions shared by other developers.
  
  By following these steps, you should be able to resolve the CFD_REGISTRY_CHECK060 error and ensure that your CDS view is correctly defined.