EvaluationSystemServer/src/main/java/cn/minbb/evaluation/entity/Classification.java

package cn.minbb.evaluation.entity;

import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import org.hibernate.annotations.CreationTimestamp;
import org.hibernate.annotations.UpdateTimestamp;

import javax.persistence.*;
import javax.persistence.Version;
import java.util.Date;
import java.util.List;

@Entity
@Table(name = "classification")
@NoArgsConstructor
public class Classification {

    @Getter
    @Setter
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "e_id", nullable = false, columnDefinition = "BIGINT COMMENT '题目类别实体ID'")
    private Long e_id;

    @Getter
    @Setter
    @Column(name = "name", nullable = false, length = 32, columnDefinition = "VARCHAR(32) COMMENT '题目类别'")
    private String name;

    @Getter
    @Setter
    @Column(name = "introduction", columnDefinition = "VARCHAR(255) COMMENT '题目类别介绍'")
    private String introduction;

    @Getter
    @Setter
    @Column(name = "remark", columnDefinition = "VARCHAR(255) COMMENT '备注'")
    private String remark;

    @Getter
    @Setter
    @Column(name = "order_by", columnDefinition = "INT COMMENT '排序'")
    private Integer orderBy;

    @Getter
    @Setter
    @Column(name = "enabled", nullable = false, columnDefinition = "TINYINT DEFAULT 1 COMMENT '启用题库'")
    private Boolean enabled;

    @Getter
    @Setter
    @ManyToMany(cascade = CascadeType.REFRESH)
    @JoinTable(name = "classification_question",
            joinColumns = {@JoinColumn(name = "classification_id", referencedColumnName = "e_id", columnDefinition = "BIGINT COMMENT '题目类别实体ID'")},
            inverseJoinColumns = {@JoinColumn(name = "question_id", referencedColumnName = "e_id", columnDefinition = "BIGINT COMMENT '题目实体ID'")})
    // 题目（列表）
    private List<Question> questionList;

    @Getter
    @Setter
    @OneToMany(cascade = {CascadeType.REFRESH}, mappedBy = "classification", fetch = FetchType.LAZY)
    // 回复（集合）
    private List<Reply> replySet;

    @Getter
    @Setter
    @Column(name = "created_at", columnDefinition = "DATETIME COMMENT '创建时间'")
    @CreationTimestamp
    private Date createdAt;

    @Getter
    @Setter
    @Column(name = "updated_at", columnDefinition = "DATETIME COMMENT '更新时间'")
    @UpdateTimestamp
    private Date updatedAt;

    @Version
    @Column(name = "version", columnDefinition = "BIGINT COMMENT '版本号'")
    public Long version;
}