How To Fix CSP_ENTITY_CHECK027 - Create by compositon not possible; etag binding not completely provided

SAP Error Message - Details

• Message type: E = Error

• Message class: CSP_ENTITY_CHECK - Messages for entity checks

• Message number: 027

• Message text: Create by compositon not possible; etag binding not completely provided

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CSP_ENTITY_CHECK027 - Create by compositon not possible; etag binding not completely provided ?

  The SAP error message CSP_ENTITY_CHECK027, which states "Create by composition not possible; etag binding not completely provided," typically occurs in the context of SAP's Cloud Application Programming (CAP) model or when working with OData services. This error indicates that there is an issue with the entity creation process, specifically related to the handling of ETag bindings.
  Cause:
  
  Incomplete ETag Binding: The error suggests that the ETag (Entity Tag) binding required for the entity creation is not fully provided. ETags are used for optimistic concurrency control and are essential for ensuring that the data being modified has not changed since it was last read.
  Composition Relationships: The error may arise when trying to create a child entity (composed entity) without providing the necessary parent entity's ETag or without the correct relationship being established.
  Service Configuration: There might be issues with the service configuration or the way the entities are defined in the data model.
  
  Solution:
  
  Check ETag Binding: Ensure that when you are creating a new entity, you are providing the correct ETag for the parent entity. This is crucial for maintaining data integrity and ensuring that the parent entity has not been modified since it was last read.
  Review Entity Relationships: Verify that the relationships between the parent and child entities are correctly defined in your data model. Ensure that the child entity creation request includes all necessary identifiers and ETags for the parent entity.
  Update Service Implementation: If you are implementing a service, make sure that the logic for handling entity creation is correctly implemented, including the handling of ETags.
  Testing: Test the entity creation process with valid data to ensure that the issue is resolved. Use tools like Postman or SAP Gateway Client to simulate the requests and check the responses.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the Cloud Application Programming model and OData services for detailed information on entity relationships and ETag handling.
  Community Forums: Check SAP Community forums or Stack Overflow for similar issues faced by other developers, as they may provide insights or solutions that have worked for them.
  Debugging: If you have access to the backend, consider debugging the service to trace where the ETag binding is failing and to understand the flow of data during the entity creation process.
  
  By addressing the ETag binding and ensuring that all necessary data is provided during the entity creation process, you should be able to resolve the CSP_ENTITY_CHECK027 error.