我想介绍 Pageable
支持我通过 SDN 4 Repository 方法的自定义 Cyper 查询:
@Query(value = "MATCH (parentD)-[:CONTAINS]->(childD:Decision)-[ru:CREATED_BY]->(u:User) WHERE id(parentD) = {decisionId} OPTIONAL MATCH (childD)<-[:VOTED_FOR]-(vg:VoteGroup)-[:VOTED_ON]->(c:Criterion) WHERE id(c) IN {criteriaIds} WITH childD, ru, u, vg.avgVotesWeight as weight RETURN childD AS decision, ru, u, sum(weight) as weight ORDER BY weight DESC", countQuery="MATCH (parentD)-[:CONTAINS]->(childD:Decision) WHERE id(parentD) = {decisionId} RETURN count(childD)")
Page<WeightedDecision> getChildDecisionsSortedBySumOfCriteriaAvgVotesWeight(@Param("decisionId") Long decisionId, @Param("criteriaIds") Set<Long> criteriaIds, Pageable pageable);
WeightedDecision
是一个@QueryResult:@QueryResult
public class WeightedDecision {
private Decision decision;
private double weight;
public Decision getDecision() {
return decision;
}
public void setDecision(Decision decision) {
this.decision = decision;
}
public double getWeight() {
return weight;
}
public void setWeight(double weight) {
this.weight = weight;
}
}
现在这个逻辑失败了
ClassCastException
异常(exception):java.lang.ClassCastException: com.example.domain.model.decision.result.WeightedDecision cannot be cast to org.springframework.data.domain.Page
我做错了什么以及如何解决?
最佳答案
SDN 2.0.4 版本不支持 @QueryResult
的分页s。版本 2.0.5 将支持此功能,该功能可用于快照构建存储库中的 UAT。
关于neo4j - Spring Data Neo4j 4 和 Pageable @QueryResult,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/38692985/