我正在使用django-彈性搜索-dsl包，并且有點(diǎn)進(jìn)退兩難。這是我的代碼：models.pyclass Source(models.model):    name = models.CharField(max_length=50)class Posting(models.Model):    title = models.CharField(max_length=250)    sources = models.ManyToMany(Sources, related_name="postings", through="PostingSource")class PostingSource(models.Model):    posting = models.ForeignKey(Posting, related_name="posting_sources", on_delete=models.CASCADE)    source = models.ForeignKey(Source, related_name="posting_sources", on_delete=models.CASCADE)documents.pyclass PostingDocument(Document):    sources = fields.ObjectField(properties={"name": fields.KeywordField()})    class Index:        name = "posting"        settings = {"all the settings stuff"}    class Django:        model = Posting        fields = ["title"]        related_models = [PostingSource]    def get_queryset(self):        return super().get_queryset().select_related("sources")    def get_instance_from_related(self, related_instance):        if isinstance(related_instance, PostingSource):            return related_instance.posting我的問題是，當(dāng)我更新帖子上的來源時(shí)，由于某種原因，彈性搜索索引pre_save更新，而不是post_save。我基本上必須使用相同的來源進(jìn)行2次放置請(qǐng)求，以使更改反映在我的索引中。我在文檔中添加了 一個(gè)，它似乎可以正常工作，但感覺它以后會(huì)導(dǎo)致性能問題。任何幫助或指導(dǎo)將不勝感激。def prepare_sources(self, instance):