Question

我正在尝试在两个表之间实现一对多关系：

主表商家

@Entity
@Table
public class Merchants {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "id", updatable = false, nullable = false)
    private int id;

    @Column
    private String name;

    @OneToMany(mappedBy="id")
    private List<Terminals> terminals;

    @Column
    private String login;
}

包含商户ID的第二表终端

@Entity
@Table
public class Terminals {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "id", updatable = false, nullable = false)
    private int id;

    @ManyToOne(fetch=FetchType.LAZY)
    @JoinColumn(name="merchant_id")
    private Merchants merchants;

    @Column
    private String mode;
}

但是随后我部署了得到异常的代码：

Caused by: java.sql.SQLSyntaxErrorException: (conn=163) Table 'production.terminals' doesn't exist
Caused by: java.sql.SQLException: Table 'production.terminals' doesn't exist
Query is: alter table terminals drop foreign key FKq779ocbhe9oeeor5591t31vx1

您知道如何解决此问题吗？

Answer 1

使用以下代码

@Entity
@Table
public class Merchants {

  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name = "merchantId", updatable = false, nullable = false)
  private int merchantId;

  @Column
  private String name;

  @OneToMany(mappedBy="merchants")
  private List<Terminals> terminals;

  @Column
  private String login;
}



@Entity
@Table
public class Terminals {

  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name = "id", updatable = false, nullable = false)
  private int id;

  @ManyToOne(fetch=FetchType.LAZY)
  @JoinColumn(name="merchantId")
  private Merchants merchants;

  @Column
  private String mode;
}

找不到一对多关系表

1 个答案: