Django项目之Elasticsearch搜索引擎的实例

sudo docker image pull delron/elasticsearch-ik:2.4.6-1.0

sudo docker load -i elasticsearch-ik-2.4.6_docker.tar

network.host: 127.0.0.1

sudo docker run -dti --network=host --name=elasticsearch -v /home/python/elasticsearch-2.4.6/config:/usr/share/elasticsearch/config delron/elasticsearch-ik:2.4.6-1.0

pip install drf-haystack
pip install elasticsearch==2.4.1

INSTALLED_APPS = [
 ...
 'haystack',
 ...
]

# Haystack
HAYSTACK_CONNECTIONS = {
 'default': {
  'ENGINE': 'haystack.backends.elasticsearch_backend.ElasticsearchSearchEngine',
  'URL': 'http://127.0.0.1:9200/', # 此处为elasticsearch运行的服务器ip地址，端口号固定为9200
  'INDEX_NAME': 'meiduo', # 指定elasticsearch建立的索引库的名称
 },
}

# 当添加、修改、删除数据时，自动生成索引
HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'

from haystack import indexes

from .models import SKU


class SKUIndex(indexes.SearchIndex, indexes.Indexable):
 """
 SKU索引数据模型类
 """
 text = indexes.CharField(document=True, use_template=True)

 def get_model(self):
  """返回建立索引的模型类"""
  return SKU

 def index_queryset(self, using=None):
  """返回要建立索引的数据查询集"""
  return self.get_model().objects.filter(is_launched=True)

{{ object.name }}
{{ object.caption }}
{{ object.id }}

python manage.py rebuild_index

from drf_haystack.serializers import HaystackSerializer


class SKUIndexSerializer(HaystackSerializer):
 """
 SKU索引结果数据序列化器
 """
 object = SKUSerializer(read_only=True)

 class Meta:
  index_classes = [SKUIndex]
  fields = ('text', 'object')

from drf_haystack.viewsets import HaystackViewSet

class SKUSearchViewSet(HaystackViewSet):
 """
 SKU搜索
 """
 index_models = [SKU]

 serializer_class = SKUIndexSerializer

router = DefaultRouter()
router.register('skus/search', views.SKUSearchViewSet, base_name='skus_search')
urlpatterns += router.urls

importError: cannot import name '_get_count'

def _get_count(queryset):
 """
 Determine an object count, supporting either querysets or regular lists.
 """
 try:
  return queryset.count()
 except (AttributeError, TypeError):
  return len(queryset)