Clash Royale CLAN TAG

One to many table relationship

I want to implement one to many table relationship with JPA:

Main table Merchants

@Entity
@Table
public class Merchants {

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

@Column
private String name;

@Column
private String login;
}


Second table Terminals which holds merchant id

@Entity
@Table
public class Terminals {

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

@Column
private int merchant_id;

@Column
private String mode;
}


I tried this code implementation:

@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;
}



@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="id")
private Merchants merchants;

@Column
private int merchant_id;

@Column
private String mode;
}


I tried to implement this code but I don't understand how I can store only the merchant_id for reference. What is the proper way to implement this?

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