com.coxautodev.graphql.tools。SchemaClassScanner错误:无法匹配类型定义(NonNullType{type=ListType{type=TypeName{name=“…”}})=

type Person {
    id: ID
    name: String!
    contact: Contact
}

type Query {
    countPersons: Long!
    findByName(name: String!): [Person]!
    findAllPerson: [Person]!
}

type Contact {
    id: ID
    emailId: String
    mobileNumber: String!
}

extend type Query {
    findAllContact: [Contact]!
    countContacts: Long!
    findByMobileNumber(mobileNumber: String!): [Contact]!
    findByEmailId(emailId: String!): [Contact]!
}

@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
@Entity
@Table(name = "persons")
public class Person extends BaseAbstractEntity {

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

    @OneToOne(fetch = javax.persistence.FetchType.LAZY)
    @JoinColumn(name = "contact_id", referencedColumnName = "id")
    private Contact contact;

}

@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
@Entity
@Table(name = "contacts")
public class Contact extends BaseAbstractEntity {

    @Column(name="contact_email_id")
    private String emailId;

    @Column(name="contact_mobile_number", nullable = false)
    private String mobileNumber;

    @OneToOne(mappedBy = "contact")
    private Person person;

}

public class Query implements GraphQLQueryResolver {

    private final PersonRepository personRepository;
    private final ContactRepository contactRepository;

    public Query(PersonRepository personRepository, ContactRepository contactRepository) {
        this.personRepository = personRepository;
        this.contactRepository = contactRepository;
    }

    public Iterable<Person> findAllPerson() {
        return personRepository.findAll();
    }
}

启动服务器时出错:

com.coxautodev.graphql.tools。SchemaClassScanner错误:无法将类型定义(NonNullType{type=ListType{type=TypeName{name='Person'}})与java类型(class.com.demo.graphql.entities.Person)匹配:java类不是List或泛型类型信息丢失:class.com.demo.graphql.entities。人

评论结束后,应用程序开始运行 findByName 和 findAllPersonfindAllPerson 在查询中:

type Query {
    countPersons: Long!
    # findByName(name: String!): [Person]!
    # findAllPerson: [Person]!
}

我认为问题在于 [Person] 在查询响应中,它是一个人的列表。

应用程序链接: https://github.com/shubham-v/spring-boot-graphql-demo/