java Spring引导JPA分页异常

Question

我正在为我的服务实现分页，其中限制和偏移作为请求体的一部分。当我在服务级别的PageRequest中设置了这些值时，我得到了以下错误和实现

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

学生要求：

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

学生服务：

@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;
    }
}

学生资料库：

@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

检查错误：

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

这意味着您不能在Pageable（或PageRequest）和Sort参数中使用@Param，它们由spring自动处理

只需删除@Param("pageRequest")就可以了

提示：使用Pageable接口而不是PageRequest类

Answer 2

看起来失败的断言只是希望您拥有AllParamAnnotatedOrNone。所以你会这样做：

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

即使你没有使用它；这里只需要一个模式（即命名的Spring数据参数）或另一个模式（即推断的Spring数据参数名称）