无法从 Flux<Object> 转换为 Flux<BOLCompliance>

Question

我在下面的方法中遇到了这个错误 “return Mono.justOrEmpty(routeLink.getComplianceIds())”

   private Flux<BOLCompliance> getComplienceRouteLink(BOLRouteLink routeLink, BillOfLadingResponse bol) {
        return Mono.justOrEmpty(routeLink.getComplianceIds())
            .flatMapMany(Flux::fromIterable)
            .flatMap(id -> complianceCaller.getComplianceById(id))
            .map(compliance -> createComplianceResponse(compliance, bol));
    }

routeLink.getComplianceIds() returns 一个字符串类型的列表， createComplianceResponse returns 类型为 BOLCompliance 的 Mono 和 complianceCaller.getComplianceById(id)) returns 类型为 Compliance

的 Mono

public Mono<Compliance> getComplianceById(String complianceID);
private Mono<BOLCompliance> createComplianceResponse(Compliance compliance, BillOfLadingResponse bol);

Answer 1

你的

.map(compliance -> createComplianceResponse(compliance, bol));

应该是

.flatMap(compliance -> createComplianceResponse(compliance, bol));

因为您的 return 类型是 Mono<BOLCompliance> for createComplianceResponse，并且您希望 BOLCompliance 继续向下移动，而不是 Mono 对象.在您的示例中，生成的 Flux 是 Flux<Mono<BOLCompliance>>.

无法从 Flux<Object> 转换为 Flux<BOLCompliance>

Cannot convert from Flux<Object> to Flux<BOLCompliance>

reactive-programming

project-reactor

spring-webflux