fix/duplicated.relatiohships.include

[Martinarbez]

Hi, I am submitting this pull request to fix issues #325 and #324.

The following changes have been made:

• Separate eager loading has been implemented for each result, and the resource is then returned in the operation processor.
• Tests have been added to check the changes.

I believe that these changes will fix the reported issues. Please let me know if you have any questions.

Thanks

Notes by reviewer

Resolves #325. Resolves #324.