在 Elasticsearch DSL DRF 上搜索嵌套字段

问题描述

这是 document.py

@chapter_index.doc_type
class ChapterDocument(Document):
    subject = fields.ObjectField(properties={
        'name': fields.TextField(),'description': fields.TextField()
    })
    
    topics = fields.nestedField(properties={
        'name': fields.TextField(),'description': fields.TextField(analyzer=html_strip),'duration': fields.IntegerField()
    })

    class Django:
        model = Chapter
        fields = [
            'name','description','order_no'
        ]
        related_models = [Subject,Topic]

    def get_queryset(self):
        return super(ChapterDocument,self).get_queryset().select_related(
            'subject'
        )

    def get_instances_from_related(self,related_instance):
        if isinstance(related_instance,Subject):
            return related_instance.chapters.all()
        if isinstance(related_instance,Topic):
            return related_instance.chapter

这是 DocumentViewSet

class ChapterSearchViewSet(DocumentViewSet):
    document = ChapterDocument
    serializer_class = ChapterDocumentSerializer

    filter_backends = [
        SearchFilterBackend,]

    search_fields = (
        'subject.name','subject.description','name',)

    search_nested_fields = {
        'topics': ['description']
    }

search_fields 正在运行。当我想在 nestedField 上搜索时，search_nested_fields 不起作用。我收到这样的错误。这来自 search_nested_fields 中的 'topics': ['description']。

索引正在工作。我想按主题描述搜索章节。也许我在 search_nested_fields 中使用了错误的格式。我遵循了 elasticsearch-dsl-drf 文档。但是出现这个错误！

解决方法

根据elasticsearch-dsl-drf documentation，声明search_nested_fields的新方法是这样的：

search_nested_fields = {
    'topics': {
        'path': 'topics','fields': ['description'],}
}