package nju.seec.helper.entity;

import lombok.Data;
import lombok.experimental.Accessors;
import org.hibernate.annotations.CacheConcurrencyStrategy;
import org.hibernate.annotations.CreationTimestamp;

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

/**
 * @author cst
 */
@Data
@Accessors(chain = true)
@Entity
@Table(name = "course_file", uniqueConstraints = {@UniqueConstraint(name = "course_file_name_unique", columnNames = {"course_id", "file_name"})})
@Cacheable
@org.hibernate.annotations.Cache(usage = CacheConcurrencyStrategy.READ_WRITE)
public class CourseFile {
    @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(name = "object_name", nullable = false)
    private String objectName;

    @Column(name = "file_name", nullable = false)
    private String fileName;

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