Mule 数据编织：基于一个记录集字段删除重复的记录集'；s值

我需要过滤有关DSUltimateId的响应。以下是我在测试时遇到的错误。

ERROR 2017-08-28 16:34:13,669 [[esb-domain].HTTPS_EIP_Listener_Configuration.worker.01] org.mule.exception.CatchMessagingExceptionStrategy: 
********************************************************************************
Message               : Exception while executing: 
            (ns0#DSUltimateId: $.ns01#stringValue  ) when $.ns01#name == "IU_ROWID" distinctBy $ ,
                                                               ^
Cannot coerce a :array to a :boolean
Type                  : com.mulesoft.weave.mule.exception.WeaveExecutionException
Code                  : MULE_ERROR--2

%dw 1.0
%output application/xml
%output application/xml inlineCloseOn = "empty"
%output application/xml skipNullOn="attributes"
%namespace ns0 http://www.example.org/IUGetMasterOrganizationRecordByIdOrName
%namespace ns01 urn:siperian.api
---
ns0#CustomerMasterDataDSUltimateResponse: {
    ns0#DSUltimate: {
        (payload.ns01#searchQueryReturn.*ns01#record.*ns01#field map
                              {

            (ns0#ElectronicAddressTypeCd: $.ns01#stringValue ) when $.ns01#name == "EADDR_TYPE_CD" and  ($.ns0#stringValue != ("" and null)),
            (ns0#ElectronicAddressTxt: $.ns01#stringValue ) when $.ns01#name == "EADDR_TXT" and $.ns0#stringValue != ("" or null),
            (ns0#DSUltimateId: $.ns01#stringValue  ) when $.ns01#name == "IU_ROWID" distinctBy $ ,
            (ns0#DSUltimateNm : $.ns01#stringValue) when $.ns01#name == "IU_NM",
            (ns0#DSUltimateClassificationCd : $.ns01#stringValue) when $.ns01#name == "IU_CLASS_CODE",
            (ns0#ApprovalStatusDSUltimateRequesterId : $.ns01#stringValue) when $.ns01#name == "APRV_STS_IU_RQSTR_ID",
            (ns0#DSUltimateCreateReasonCd : $.ns01#stringValue) when $.ns01#name == "IU_CRE_RSN_CD",
            (ns0#DSUltimateApprovalStatusCd : $.ns01#stringValue) when $.ns01#name == "IU_APRV_STS_CD",
            (ns0#DSUltimateEffectiveStartDtm : $.ns01#dateValue) when $.ns01#name == "EFF_STRT_DTM",
            (ns0#DSUltimateEffectiveEndDtm : $.ns01#dateValue !=null) when $.ns01#name == "EFF_END_DTM"
        }
            ) 
    }
}

这是我的数据编织代码：我试图根据“DSUltimateID”**筛选出重复记录，这可能会出现多次。

ERROR 2017-08-28 16:34:13,669 [[esb-domain].HTTPS_EIP_Listener_Configuration.worker.01] org.mule.exception.CatchMessagingExceptionStrategy: 
********************************************************************************
Message               : Exception while executing: 
            (ns0#DSUltimateId: $.ns01#stringValue  ) when $.ns01#name == "IU_ROWID" distinctBy $ ,
                                                               ^
Cannot coerce a :array to a :boolean
Type                  : com.mulesoft.weave.mule.exception.WeaveExecutionException
Code                  : MULE_ERROR--2

%dw 1.0
%output application/xml
%output application/xml inlineCloseOn = "empty"
%output application/xml skipNullOn="attributes"
%namespace ns0 http://www.example.org/IUGetMasterOrganizationRecordByIdOrName
%namespace ns01 urn:siperian.api
---
ns0#CustomerMasterDataDSUltimateResponse: {
    ns0#DSUltimate: {
        (payload.ns01#searchQueryReturn.*ns01#record.*ns01#field map
                              {

            (ns0#ElectronicAddressTypeCd: $.ns01#stringValue ) when $.ns01#name == "EADDR_TYPE_CD" and  ($.ns0#stringValue != ("" and null)),
            (ns0#ElectronicAddressTxt: $.ns01#stringValue ) when $.ns01#name == "EADDR_TXT" and $.ns0#stringValue != ("" or null),
            (ns0#DSUltimateId: $.ns01#stringValue  ) when $.ns01#name == "IU_ROWID" distinctBy $ ,
            (ns0#DSUltimateNm : $.ns01#stringValue) when $.ns01#name == "IU_NM",
            (ns0#DSUltimateClassificationCd : $.ns01#stringValue) when $.ns01#name == "IU_CLASS_CODE",
            (ns0#ApprovalStatusDSUltimateRequesterId : $.ns01#stringValue) when $.ns01#name == "APRV_STS_IU_RQSTR_ID",
            (ns0#DSUltimateCreateReasonCd : $.ns01#stringValue) when $.ns01#name == "IU_CRE_RSN_CD",
            (ns0#DSUltimateApprovalStatusCd : $.ns01#stringValue) when $.ns01#name == "IU_APRV_STS_CD",
            (ns0#DSUltimateEffectiveStartDtm : $.ns01#dateValue) when $.ns01#name == "EFF_STRT_DTM",
            (ns0#DSUltimateEffectiveEndDtm : $.ns01#dateValue !=null) when $.ns01#name == "EFF_END_DTM"
        }
            ) 
    }
}

---

这是我的示例输入

您在映射时使用的

distinctBy

，但应该在映射后使用。请参考

我无法发布问题中的示例输入，因为该网站给出了一些奇怪且不太有效的错误。