为准备好的字段更新Django Haystack搜索索引

我用的是Django Haystack。 这是我的密码：

设置.py

HAYSTACK_CONNECTIONS = {
    'default': {
        'ENGINE': 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine',
        'URL': 'http://127.0.0.1:9200/',
        'INDEX_NAME': 'haystack',
    },
}

HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'

class PostIndex(indexes.SearchIndex, indexes.Indexable):
    text = indexes.CharField(document=True, use_template=True)
    owner = indexes.CharField(model_attr='owner')
    image_url = indexes.CharField()

    def get_model(self):
        return Post

    def prepare_image_url(self, obj):
        # Get first images for resulted search objects
        return [image.image_main_page.url for image in obj.images.order_by('id')[:1]]

    def index_queryset(self, using=None):
        """Used when the entire index for model is updated."""
        return self.get_model().objects.all()

搜索索引.py

HAYSTACK_CONNECTIONS = {
    'default': {
        'ENGINE': 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine',
        'URL': 'http://127.0.0.1:9200/',
        'INDEX_NAME': 'haystack',
    },
}

HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'

class PostIndex(indexes.SearchIndex, indexes.Indexable):
    text = indexes.CharField(document=True, use_template=True)
    owner = indexes.CharField(model_attr='owner')
    image_url = indexes.CharField()

    def get_model(self):
        return Post

    def prepare_image_url(self, obj):
        # Get first images for resulted search objects
        return [image.image_main_page.url for image in obj.images.order_by('id')[:1]]

    def index_queryset(self, using=None):
        """Used when the entire index for model is updated."""
        return self.get_model().objects.all()

正如您所看到的，我使用RealtimeSignalProcessor在创建或更新实例后对其进行索引。它实际上在创建时索引实例，除了使用prepare方法的image\u url字段。它在实例更新时建立索引

问题是为什么它不在创建时被索引

---

任何指针都非常感谢。

我最终使用了如下定制信号处理器：

class RelatedRealtimeSignalProcessor(RealtimeSignalProcessor):
"""
Extension to haystack's RealtimeSignalProcessor not only causing the
search_index to update on saved model, but also for image url, which is needed to show
images on search results
"""

def handle_save(self, sender, instance, **kwargs):
    if hasattr(instance, 'reindex_related'):
        for related in instance.reindex_related:
            related_obj = getattr(instance, related)
            self.handle_save(related_obj.__class__, related_obj)
    return super(RelatedRealtimeSignalProcessor, self).handle_save(sender, instance, **kwargs)

def handle_delete(self, sender, instance, **kwargs):
    if hasattr(instance, 'reindex_related'):
        for related in instance.reindex_related:
            related_obj = getattr(instance, related)
            self.handle_delete(related_obj.__class__, related_obj)
    return super(RelatedRealtimeSignalProcessor, self).handle_delete(sender, instance, **kwargs)

并在设置中指向它：

HAYSTACK_SIGNAL_PROCESSOR = 'your_app.signals.RelatedRealtimeSignalProcessor'