在 Django_Restful_framework 中自定义 ElasticSearch 中的排序字段

如何解决在 Django_Restful_framework 中自定义 ElasticSearch 中的排序字段

class PublisherDocumentView(DocumentViewSet):
    document = RecommendationDocument
    serializer_class = RecommendationElasicSerializer
    lookup_field = 'id'
    fielddata = True
    filter_backends = [
        FilteringFilterBackend,CompoundSearchFilterBackend,DefaultOrderingFilterBackend,OrderingFilterBackend,SearchFilterBackend,SuggesterFilterBackend,# This should be the last backend
    ]

    search_fields = (
        'sku','artikelNr1','artikelNr2','statusCode','statusText','saisonRetourenCode','saisonRetourenText','saisonCode','saisonText','geschlechtCode','geschlechtText','rayonCode','rayonText','warenArtCode','warenArtText','wuCode','wuText','waCode','warenGruppe','alterCode','farbe','material','bezeichnung','pictureName','picturePathLocal','kollektion','comCode','lieferant','eKchf','eti','vp','groessenCode','categories','groessen','zlQty','productId','published','productName','shortDescription','fullDescription','flag'
    )
    multi_match_search_fields = (
        'sku','flag'
    )
    filter_fields = {
        'artikelNr1': 'artikelNr1.raw','artikelNr2': 'artikelNr2.raw','statusText': 'statusText.raw','flag': 'flag.raw',}
    ordering_fields = {
        'flag': 'flag.raw',}
    ordering = ('flag',)

我想根据它们的值自定义这个“标志”字段的排序，比如“isMust 或 IsNew”假设在排序字段中排在第一位。你们知道怎么做吗？任何机构都知道如何解决这些问题。提前致谢