Playframework Ebean如何将字符串排除为列

所以我有下面的代码。我试图创建一个名为SecurityType的表，该表的值为ID和description。我想给它添加两个字符串“Administrator”和“user”。有没有办法将这两个列排除在ebean表中？还是我需要换个班

@Entity
public class SecurityType extends Model {
    public static final String ADMIN = "Administrator";
    public static final String USER = "User";
    @Id
    public Long id;

    public String description;
}

让它们暂时化：

@Entity
public class SecurityType extends Model {
    @Transient
    public static final transient String ADMIN = "Administrator";
    @Transient
    public static final transient String USER = "User";
    @Id
    public Long id;

    public String description;
}