lasuo_back/src/main/java/com/izouma/nineth/repo/CollectionRepo.java

package com.izouma.nineth.repo;

import com.izouma.nineth.domain.Collection;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;

import javax.transaction.Transactional;
import java.util.List;
import java.util.Optional;

public interface CollectionRepo extends JpaRepository<Collection, Long>, JpaSpecificationExecutor<Collection> {
    @Query("update Collection t set t.del = true where t.id = ?1")
    @Modifying
    @Transactional
    void softDelete(Long id);

    Optional<Collection> findByIdAndDelFalse(Long id);

    @Query("update Collection t set t.likes = t.likes + ?2 where t.id = ?1")
    @Modifying
    @Transactional
    void addLike(Long id, int num);

    @Query(value = "select distinct c from Collection c join Like l on l.collectionId = c.id " +
            "where l.userId = ?1 and l.del = false and c.del = false")
    List<Collection> userLikes(Long userId);
}