cloudnote_server/src/main/java/com/bupt/note/Repository/RatingRepository.java

package com.bupt.note.Repository;

import com.bupt.note.Model.Rating;
import org.springframework.data.jpa.repository.JpaRepository;

public interface RatingRepository extends JpaRepository<Rating, Long> {
    Rating findByPaperIdAndUserName(Long paperId, String userName);
}