How To Fix CL_RAP_OPXY_EDMX_MSG028 - Entity Type & has not properties

SAP Error Message - Details

• Message type: E = Error

• Message class: CL_RAP_OPXY_EDMX_MSG -

• Message number: 028

• Message text: Entity Type & has not properties

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CL_RAP_OPXY_EDMX_MSG028 - Entity Type & has not properties ?

  The SAP error message CL_RAP_OPXY_EDMX_MSG028 indicates that the specified entity type does not have any properties defined. This error typically occurs in the context of the RAP (Rapid Application Programming) model in SAP, particularly when working with OData services or when defining entity types in the service definition.
  Cause:
  
  No Properties Defined: The entity type mentioned in the error message has been defined without any properties. In RAP, every entity type should have at least one property to be valid.
  Incorrect Metadata: There might be an issue with the metadata definition where the properties are not correctly defined or are missing.
  Model Configuration Issues: There could be issues in the configuration of the RAP model or the service definition that lead to the entity type being recognized without properties.
  
  Solution:
  
  
  Define Properties: Ensure that the entity type has at least one property defined. You can do this by checking the definition of the entity type in the relevant CDS (Core Data Services) view or the service definition.
  
  Example:
  define root view entity ZMyEntity
  as select from my_table
  {
    key field1,
    field2,
    field3
  }
  
  Make sure that the entity has key fields and other properties defined.
  
  
  
  Check Metadata: Review the metadata of the service to ensure that the properties are correctly defined and are being recognized by the system. You can use transaction /IWFND/MAINT_SERVICE to check the service and its metadata.
  
  
  Regenerate the Service: If you have made changes to the entity type or its properties, regenerate the service to ensure that the changes are reflected. You can do this by using the Service Maintenance transaction.
  
  
  Check for Annotations: Ensure that any necessary annotations are present in the CDS view that might define the properties or their visibility in the OData service.
  
  
  Debugging: If the issue persists, consider debugging the service to trace where the entity type is being processed and why it is being recognized without properties.
  
  
  Related Information:
  
  RAP Model: The RAP model is designed to simplify the development of business applications in SAP S/4HANA. Understanding the structure and requirements of the RAP model is crucial for effective development.
  OData Services: Familiarity with OData services and how they interact with entity types and properties is essential for troubleshooting related issues.
  SAP Documentation: Refer to the official SAP documentation for RAP and OData services for detailed guidelines and best practices.
  
  By following these steps, you should be able to resolve the error and ensure that your entity type is correctly defined with the necessary properties.