Post.java

package com.example.devSns.domain;

import jakarta.persistence.*;
import jakarta.validation.constraints.NotBlank;
import lombok.*;

import java.util.ArrayList;
import java.util.List;

@Entity
@Getter
@NoArgsConstructor(access = AccessLevel.PROTECTED)
public class Post {
    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @NotBlank
    @Column(nullable = false)
    private String title;

    @Lob
    private String content;

    @OneToMany(mappedBy = "post", cascade = CascadeType.ALL, orphanRemoval = true)
    private final List<Comment> comments = new ArrayList<>();

    @Builder
    private Post(String title, String content) {
        this.title = title;
        this.content = content;
    }

    public void update(String title, String content) {
        this.title = title;
        this.content = content;
    }

    /** 양방향 편의 메서드 */
    void addComment(Comment c) {
        comments.add(c);
        c.setPostInternal(this);
    }
    void removeComment(Comment c) {
        comments.remove(c);
        c.setPostInternal(null);
    }
}