text: 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)
      id = indexes.IntegerField(model_attr='id')
      name = indexes.CharField(model_attr='name')
      price = indexes.CharField(model_attr='price')
      default_image_url = indexes.CharField(model_attr='default_image_url')
      comments = indexes.IntegerField(model_attr='comments')
  
      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)