backend/src/main/java/nju/seec/helper/data/entity/Comment.java

package nju.seec.helper.data.entity;

import lombok.Data;
import nju.seec.helper.util.enums.UserType;
import org.hibernate.annotations.CreationTimestamp;

import javax.persistence.*;
import java.time.LocalDateTime;
import java.util.Collections;
import java.util.Set;

/**
 * @author cst
 */
@Data
@Entity
@Table(name = "comment")
public class Comment {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    @Column(name = "item_id")
    private Integer itemId;

    @Column(name = "user_id")
    private Integer userId;

    @Column(name = "user_name")
    private String username;

    @Enumerated(EnumType.STRING)
    @Column(name = "user_type")
    private UserType userType;

    private String content;

    @Column(name = "publish_time", updatable = false)
    @CreationTimestamp
    private LocalDateTime publishTime;

    @OneToMany(cascade = CascadeType.ALL, mappedBy = "fatherComment")
    private Set<Comment> followComments = Collections.emptySet();

    @ManyToOne
    @JoinColumn(name = "father_comment_id")
    private Comment fatherComment;
}