package com.openisle.repository; import com.openisle.model.Post; import com.openisle.model.PostSubscription; import com.openisle.model.User; import org.springframework.data.jpa.repository.JpaRepository; import java.util.List; import java.util.Optional; public interface PostSubscriptionRepository extends JpaRepository { List findByPost(Post post); List findByUser(User user); Optional findByUserAndPost(User user, Post post); }