用Spring和MongoTemplate在对象中获取list对象

Question

public class Employee {

    @Id
    private String id;
    private String firstName;
    private String lastName;
    private float salary;
    private List<Address> addresses;
    private Date joiningDate;

query.fields().include(addresses);

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.data.mapping.model.MappingInstantiationException: Failed to instantiate com.example.demo.model.Employee using constructor public com.example.demo.model.Employee(java.lang.String,java.lang.String,java.lang.String,float,java.util.List,java.util.Date) with arguments 60d5798c319336085ac8130a,hello,null,null,null,null] with root cause

@Repository
public class EmployeeRepository {

    @Autowired
    MongoTemplate mongoTemplate;

    public List<Employee> findAddressesByFirstName(String firstName) {
        Query query = new Query(Criteria.where("firstName").is(firstName));
        query.fields().include("addresses");
        return mongoTemplate.find(query, Employee.class);
    }
}

    public List<Employee> findAddressesByFirstName(String firstName) {
        return employeeRepository.findAddressesByFirstName(firstName);
    }

    @GetMapping("/firstName/{firstName}")
    public List<Employee> getAddressesByFirstName(@PathVariable("firstName") String firstName){
        return employeeService.findAddressesByFirstName(firstName);
    }

Answer 1

工资在蒙哥是零的吗？

float类型的薪资不能为空，它是基类型

您可以将其修改为浮动，或者为其赋值；