在SDN4中,自定义查询是否支持分页?
- 如果支持,它是如何工作的?
- 如果不支持,有没有变通方法?
我有以下 Spring Data Neo4j 4 仓库:
@Repository
public interface TopicRepository
extends GraphRepository<Topic>,IAuthorityLookup {
// other methods omitted
@Query("MATCH (t:Topic)-[:HAS_OFFICER]->(u:User) "
+ "WHERE t.id = {0} "
+ "RETURN u")
public Page<User> topicOfficers(Long topicId, Pageable pageable);
}
相应的测试用例:
@Test
public void itShouldReturnAllOfficersAsAPage() {
Pageable pageable = new PageRequest(1,10);
Page<User> officers = topicRepository.topicOfficers(1L, pageable);
assertNotNull(officers);
}
当我运行测试时,遇到了以下异常。
Failed to convert from type java.util.ArrayList<?> to type org.springframework.data.domain.Page<?> for value '[org.lecture.model.User@1]';
nested exception is org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type java.util.ArrayList<?> to type org.springframework.data.domain.Page<?>
这是我的设置:
dependencies {
//other dependencies omitted
compile("org.neo4j:neo4j-cypher-dsl:2.0.1")
compile "org.neo4j.app:neo4j-server:2.2.2"
compile(group: 'org.springframework.data',
name: 'spring-data-neo4j',
version: '4.0.0.BUILD-SNAPSHOT')
compile(group: 'org.springframework.data',
name: 'spring-data-neo4j',
version: '4.0.0.BUILD-SNAPSHOT',
classifier: 'tests')
testCompile(group: 'org.neo4j',
name: 'neo4j-kernel',
version: '2.2.2',
classifier: 'tests')
testCompile(group: 'org.neo4j.app',
name: 'neo4j-server',
version: '2.2.2',
classifier: 'tests')
testCompile(group: 'org.neo4j',
name: 'neo4j-io',
version: '2.2.2',
classifier: 'tests')
}
我使用的快照应该能够处理分页,因为以下测试运行良好:
@Test
public void itShouldReturnAllTopicsAsAPage() {
Pageable pageable = new PageRequest(1,10);
Page<Topic> topics = topicRepository.findAll(pageable);
assertNotNull(topics);
}