我检查了几种不同的方式来检查哪里是错误，但我仍然不知道答案。
这是我的RestController

@RestController
public class CustomerController {
    @PostMapping(value = "/customer")
    public ResponseEntity<CustomerResponse> addCustomer(@RequestBody @Valid Customer custRequest) throws Exception {
        ModelMapper modelMapper = new ModelMapper();
        CustomerDto customerDto = modelMapper.map(custRequest, CustomerDto.class);
        CustomerDto addCust = customer.addCustomer(customerDto);
        CustomerResponse custResponse = modelMapper.map(addCust, CustomerResponse.class);
        return new ResponseEntity<CustomerResponse>(custResponse, HttpStatus.CREATED);
    }
}

那是我的模特

@Entity
@Table(name = "customers")
public class Customer {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    private String idCustomer;
    private String email;
    @OneToMany(mappedBy = "customer",cascade = CascadeType.ALL,fetch = FetchType.EAGER)
    private List<Choice> choices;
    // Getter and setter and constructor
}

Maven依赖关系

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.modelmapper</groupId>
            <artifactId>modelmapper</artifactId>
            <version>2.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
</dependencies>

Postman

回应
我怎样才能解决这个问题来发布一个新的客户。