Spring Boot JPA分頁異常

Question

我正在為我的服務實現分頁，其中限制和偏移量是請求正文的一部分。 在服務級別的PageRequest中設置這些值后，出現以下錯誤和實現

Caused by: java.lang.IllegalArgumentException: Either use @Param on all parameters except Pageable and Sort typed once, or none at all!
    at org.springframework.util.Assert.isTrue(Assert.java:92) ~[spring-core-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.data.repository.query.Parameters.assertEitherAllParamAnnotatedOrNone(Parameters.java:297) ~[spring-data-commons-1.13.8.RELEASE.jar:na]
    at org.springframework.data.repository.query.Parameters.<init>(Parameters.java:91) ~[spring-data-commons-1.13.8.RELEASE.jar:na]
    at org.springframework.data.jpa.repository.query.JpaParameters.<init>(JpaParameters.java:43) ~[spring-data-jpa-1.11.8.RELEASE.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryMethod.createParameters(JpaQueryMethod.java:325) ~[spring-data-jpa-1.11.8.RELEASE.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryMethod.createParameters(JpaQueryMethod.java:53) ~[spring-data-jpa-1.11.8.RELEASE.jar:na]
    at org.springframework.data.repository.query.QueryMethod.<init>(QueryMethod.java:77) ~[spring-data-commons-1.13.8.RELEASE.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryMethod.<init>(JpaQueryMethod.java:89) ~[spring-data-jpa-1.11.8.RELEASE.jar:na]
    at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:77) ~[spring-data-jpa-1.11.8.RELEASE.jar:na]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:436) ~[spring-data-commons-1.13.8.RELEASE.jar:na]
    at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:221) ~[spring-data-commons-1.13.8.RELEASE.jar:na]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:277) ~[spring-data-commons-1.13.8.RELEASE.jar:na]
    at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:263) ~[spring-data-commons-1.13.8.RELEASE.jar:na]
    at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:101) ~[spring-data-jpa-1.11.8.RELEASE.jar:na]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    ... 55 common frames omitted

學生要求：

{
  "name": "string",
  "paging": {
    "limit": 0,
    "startOffset": 0
  }
}

學生服務：

@Service
public class StudentService {

    @Autowired
    private StudentRepository studentRepository;

    public List<Student> getAllStudents(StudentRequest studentRequest) {

       List<Student> studentList = studentRepository.getAll(studentRequest,new PageRequest(studentRequest.getPaging().getStartOffset(), studentRequest.getPaging().getLimit()));
       return studentList;
    }
}

學生資料庫：

@Repository
public interface StudentRepository extends CrudRepository<Student, Long> {

    @Query(value = "select o from Student  o  where (o.name = :#{#studentRequest.name} OR :#{#studentRequest.name} IS NULL ) ")
    public List<Student> getAll(@Param("studentRequest") StudentRequest studentRequest, PageRequest pageRequest);
}

Answer 1

檢查錯誤：

use @Param on all parameters except Pageable and Sort typed once, or none at all!

這意味着您不能在Pageable （或PageRequest ）和Sort參數中使用@Param ，它們將由spring自動處理。

只需刪除@Param("pageRequest") 。

提示：使用Pageable接口而不是PageRequest類。

Answer 2

看起來失敗的斷言只是希望您具有AllParamAnnotatedOrNone 。 所以你會做：

public List<Student> getAll(@Param("studentRequest") StudentRequest studentRequest, 
    @Param("pageRequest") PageRequest pageRequest);

即使您沒有使用它； 您只需要一個模式（即名為Spring Data參數）或其他模式（即推斷出的Spring Data參數名稱）。