如何解决Spring Data JPA CRUD Repository Interface JPQL @Query 生成自定义查询失败 命名返回值
我正在开发基于休息(非休息)的 api,但遇到以下问题。尝试使用 JPQL 创建自定义查询以更新客户信息。实体客户中的成员电子邮件是唯一的,因此我必须编写自己的查询,否则会导致唯一的约束冲突异常。到目前为止,我发现了这一点,现在我正在尝试通过在 Spring CRUD Repository Interface 中使用 JPQL 编写自定义查询来修复。
客户控制器
@RestController public class CustomerController {
@Autowired
private CustomerService customerService;
@GetMapping("/customers")
public List<CustomerDTO> allCustomer(){
return customerService.findAll();
}
@GetMapping("/customers/{id}")
public CustomerDTO oneCustomer(@PathVariable("id") long id) {
return customerService.findOneById(id);
}
@PostMapping("/customers")
public CustomerDTO addCustomer(@RequestBody CustomerDTO customerDTO) {
return customerService.saveCustomer(customerDTO);
}
@PutMapping("/customers/{id}")
public CustomerDTO updateCustomer(@RequestBody CustomerDTO customerDTO) {
return customerService.updateCustomer(customerDTO);
}
@DeleteMapping("/customers/{id}")
public void deleteCustomer(@PathVariable("id") long id) {
customerService.deleteCustomer(id);
}
}
客户服务
@Service
public class CustomerService {
@Autowired
private CustomerRepository customerRepository;
@Autowired
private CustomerDTO customerDTO;
@Autowired
private modelmapper modelmapper;
private final Logger log = LoggerFactory.getLogger(CustomerService.class);
// Gebe Liste von Kunden zurück
public List<CustomerDTO> findAll() {
var it = customerRepository.findAll();
var customerList = new ArrayList<CustomerDTO>();
for (Customer customer : it) {
customerDTO = convertToDto(customer);
customerList.add(customerDTO);
}
return customerList;
}
// Gebe einen bestimmten Kunden zurück
public CustomerDTO findOneById(long id) {
Customer customer = customerRepository.findById(id);
CustomerDTO customerDTO = convertToDto(customer);
return customerDTO;
}
// Speicher einen Kunden in der Datenbank und gebe diesen zurück
public CustomerDTO saveCustomer(CustomerDTO customerDTO) {
if (customerDTO != null) {
Customer savedobject = customerRepository.save(convertToEntity(customerDTO));
// Abrufen der gespeicherten Entity und Umwandlung in DTO,weil DTO nun weitere Werte enthält als zuvor (Id & timestamp)
CustomerDTO responseCustomer = convertToDto(customerRepository.findById(savedobject.getId()).get());
return responseCustomer;
} else {
log.info("Kunden speichern in die Datenbank fehlgeschlagen");
return null;
}
}
// Kundendaten bearbeiten
public CustomerDTO updateCustomer(CustomerDTO customerDTO) {
if (customerDTO != null) {
Customer updatedobject = customerRepository.updateCustomerByDTO(convertToEntity(customerDTO));
// Abrufen der gespeicherten Entity und Umwandlung in DTO
Customer getCustomer = customerRepository.findById(updatedobject.getId()).get();
CustomerDTO responseCustomer = convertToDto(getCustomer);
return responseCustomer;
} else {
log.info("Bearbeiten des Kunden in der Datenbank fehlgeschlagen!");
return null;
}
}
// Lösche Kunden aus der Datenbank
public void deleteCustomer(Long id) {
customerRepository.deleteById(id);
}
// Umwandlung von Entity zu DTO Objekt
public CustomerDTO convertToDto(Customer customer) {
CustomerDTO customerDTO = modelmapper.map(customer,CustomerDTO.class);
return customerDTO;
}
// Umwandlung von DTO zu Entity Objekt
private Customer convertToEntity(CustomerDTO customerDTO) {
Customer customer = modelmapper.map(customerDTO,Customer.class);
return customer;
}
}
客户资料库
public interface CustomerRepository extends CrudRepository<Customer,Long> {
/*
* Here we can create our custom search queries on CustomerRepository
*/
List<Customer> findBySurname(String surname);
Customer findById(long id);
Customer findByEmail(String email);
//Update Customer workaround email field ConstraintViolationException
@Transactional
@Modifying
@Query("UPDATE Customer c SET c.given_name = :#{#customer.given_name},c.surname = :#{#customer.surname},c.birthday= :#{#customer.birthday},"
+ " c.street_address = :#{#customer.street_address},c.city = :#{#customer.city},c.postal_code = :#{#customer.postal_code},"
+ " c.phone_number = :#{#customer.phone_number},c.balance= :#{#customer.balance},c.bonuspoints= :#{#customer.bonuspoints}"
+ " WHERE c.id = :#{#customer.id} ")
Customer updateCustomerByDTO(@Param("customer") Customer customer);
}
这会导致遵循 Stacktrace,到目前为止我还没有找到任何解决方案。 堆栈跟踪
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customerController': Unsatisfied dependency expressed through field 'customerService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customerService': Unsatisfied dependency expressed through field 'customerRepository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository' defined in com.yildiz.Tradilianz.customer.CustomerRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Invocation of init method Failed; nested exception is java.lang.IllegalArgumentException: Validation Failed for query for method public abstract com.yildiz.Tradilianz.customer.Customer com.yildiz.Tradilianz.customer.CustomerRepository.updateCustomerByDTO(com.yildiz.Tradilianz.customer.Customer)!
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:643) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessproperties(AutowiredAnnotationBeanPostProcessor.java:399) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.populateBean(AbstractAutowireCapablebeanfactory.java:1415) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.doCreateBean(AbstractAutowireCapablebeanfactory.java:608) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.AbstractAutowireCapablebeanfactory.createBean(AbstractAutowireCapablebeanfactory.java:531) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.Abstractbeanfactory.lambda$doGetBean$0(Abstractbeanfactory.java:335) ~[spring-beans-5.3.2.jar:5.3.2]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.2.jar:5.3.2]
at .......
Stacktrace 告诉我,验证是错误的,但我认为我的 JPQL 查询是正确的。我很困惑你知道我做错了什么吗?
解决方法
命名
有可能与命名的问题。您不包括您的客户的实体。为您的JPQL查询表明它是否真的使用snake_case命名约定?
在 JPQL 中,您应该使用Java 类中的确切字段名称。通常是camelCase命名约定,而在数据库中使用snake_case。
返回值
肯定存在与方法签名的问题。修改的查询只能使用空隙或INT /整数作为返回类型。
假设你真的使用客户一个snake_case和改变的返回类型后,updateCustomerByDTO
void的,查询工作正常。
void updateCustomerByDTO(@Param("customer") Customer customer);
关于如何处理不可更新的电子邮件问题的另一个提示。你可以只用一个@Column
注释与updatable
属性设置为false
。如果您真的不想更新电子邮件,那会容易得多。
@Entity
class Customer {
...
@Column(updatable = false)
String email;
...
}
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。