backend/src/main/java/nju/seec/helper/entity/Notice.java

package nju.seec.helper.entity;

import lombok.Data;
import lombok.experimental.Accessors;
import org.hibernate.annotations.CreationTimestamp;
import org.hibernate.annotations.DynamicInsert;
import org.hibernate.annotations.DynamicUpdate;
import org.hibernate.annotations.UpdateTimestamp;

import javax.persistence.*;
import java.time.LocalDateTime;

/**
 * @author cst
 */
@Data
@Accessors(chain = true)
@Entity
@Table(name = "notice")
@DynamicUpdate
@DynamicInsert
//@Cacheable
//@org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class Notice {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "course_id", nullable = false)
    private Long courseId;

    @Column(name = "teacher_id", nullable = false)
    private Long teacherId;

    @Column(nullable = false)
    private String title;

    @Column(columnDefinition = "text", nullable = false)
    private String content;

    @Column(name = "create_at", nullable = false, updatable = false)
    @CreationTimestamp
    private LocalDateTime createAt;

    @Column(name = "update_at", nullable = false)
    @UpdateTimestamp
    private LocalDateTime updateAt;
}