package net.alawn.bill.repository;

import net.alawn.bill.entity.po.Book;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Modifying;
import org.springframework.data.jpa.repository.Query;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * @Author: Alawn
 * @Description:
 * @Date: Create in 11:14 2019-05-23
 */

@Transactional
@Repository
public interface BookRepo extends JpaRepository<Book, Long> {

    List<Book> findByUserId(long userId);

    @Modifying
    @Query(value = "update t_bill_books set total_amount = (select sum(amount) from t_bill_items where book_id = ?1) where id = ?1",nativeQuery = true)
    void sumAmount(long bookId);
}