1

我有一个使用django hashid字段的模型id

class Artwork(Model):

    id = HashidAutoField(primary_key=True, min_length=8, alphabet="0123456789abcdefghijklmnopqrstuvwxyz")

    title = ....

这是另一个模型的相关项目

class ArtworkFeedItem(FeedItem):
    artwork = models.OneToOneField('artwork.Artwork', related_name='artwork_feeditem', on_delete=models.CASCADE)

现在我正在尝试设置 [django elasticsearch dsl] ( https://github.com/django-es/django-elasticsearch-dsl ) 并为此设置Document

@registry.register_document
class ArtworkFeedItemDocument(Document):
    class Index:
        name = 'feed'
        settings = {
            'number_of_shards': 1,
            'number_of_replicas': 0
        }

    artwork = fields.ObjectField(
        properties={
            'id': fields.TextField(),
            'title': fields.TextField(
                attr='title',
                fields={
                    'suggest': fields.Completion(),
                }
            )
        }

    )

    class Django:
        model = ArtworkFeedItem
        fields = []
        related_models = [Artwork]

但是,当我尝试使用rebuild索引时,python manage.py search_index --rebuild出现以下异常

elasticsearch.exceptions.SerializationError: ({'index': {'_id': Hashid(135): l2vylzm9, '_index': 'feed'}}, TypeError("Unable to serialize Hashid(135): l2vylzm9 (type: <class 'hashid_field.hashid.Hashid'>)",))

Django elasticsearch dsl 显然不知道如何处理这样的 hashid 字段。

我想也许我可以让我自己HashIdField喜欢

from elasticsearch_dsl import Field
class HashIdField(Field):
    """
    Custom DSL field to support HashIds
    """

    name = "hashid"

    def _serialize(self, data):
        return data.hashid

然后使用它'id': HashIdField,但这给了我另一个例外

elasticsearch.exceptions.RequestError: RequestError(400, 'mapper_parsing_exception', 'No handler for type [hashid] declared on field [id]')

有谁知道我怎样才能让它工作?

4

1 回答 1

0

对于任何有兴趣的人,我设法通过覆盖的generate_id方法来解决这个问题,Document以便_id使用的只是一个普通的字符串:


    @classmethod
    def generate_id(cls, object_instance):
        return object_instance.id.hashid
于 2021-08-21T02:56:49.523 回答