source: src/main/java/com/example/salonbella/repository/ProductRepository.java

package com.example.salonbella.repository;

import com.example.salonbella.entity.ProductEntity;
import org.springframework.data.jpa.repository.JpaRepository;

import java.util.Optional;

public interface ProductRepository extends JpaRepository<ProductEntity,Long> {
    Optional<ProductEntity> findById(Long id);
}