我正在构建一个类似于以下内容的api：

所以我对etiquetas（“tags”）列表有个问题，我不知道如何让它在我的api中正确地检索不同的值。我在Maven和标签之间建立了一种多对多的关系，比如：
Maven模型：

@Entity
@Table(name="experts")
public class Expert {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;
    private String surname;
    private String dni;
    private String address;
    private String mail;
    private String phone;
    private String created_at;
    private String updated_at;
    private String linkedln;
    private String state;
    private String rating;
    private String availability;

    @ManyToMany(mappedBy="expert", cascade = CascadeType.MERGE,fetch = FetchType.LAZY)
    @JsonIgnore
    private List<Tag> tags = new ArrayList<>();

    public Expert() {
    }

    public Expert(String name, String surname, String dni, String address, String mail, String phone, String created_at, String updated_at, String linkedln, String state, String rating, List<Tag> tags, String availability) {
        this.name = name;
        this.surname = surname;
        this.dni = dni;
        this.address = address;
        this.mail = mail;
        this.phone = phone;
        this.created_at = created_at;
        this.updated_at = updated_at;
        this.linkedln = linkedln;
        this.state = state;
        this.rating = rating;
        this.tags = tags;
        this.availability = availability;
    }

my tags model:

    @Entity
    @Table(name="tags")
    public class Tag {

        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        private Long id;
        private String name;

        @ManyToMany(cascade = CascadeType.MERGE)
        @JoinTable(
                name = "experts_tags",
                joinColumns = {@JoinColumn(name="tag_id", referencedColumnName = "id")},
                inverseJoinColumns = {@JoinColumn(name="expert_id", referencedColumnName = "id")}
        )
        private List<Expert> expert = new ArrayList<>();

        public Tag() {
        } //getters and setters

我的expertdao以这种方式在数据库中发布值：

@Override
    public Expert postExpert(Expert expert) {
         this.manager.persist(expert);
         return expert;
    }

当我尝试使用postman时，我看到expert已成功发布，但它检索所有值，除了标记one：

当我在heroku中看到我的api时，我看到它发布了ok，但我没有标签字段：
{“id”：174，“name”：“paco”，“姓氏”：“l”ópez，“dni”：“293912393d”，“地址”：“calle obispo 15，madrid”，“邮件”：joaquin@muñoz.com“，”phone“：”6722292394“，”created\u at“：”15/04/2021“，”updated\u at“：”16/05/2021“，”linkedln“：”https://www.linkedin.com/in/sara-b-54b93543/“，”state“：”por validar“，”rating“：”55“，”availability“：”mañ阿纳斯“}]
我要让这个区域出现！我该怎么做？？？非常感谢您的帮助！提前谢谢。