solr：按多值字段分组

Question

我有一个 solr 文档结构

   [
     {
       category:{mobiles},
       name: iphone,
       store: chroma,
       discount: 10%
     },
    {
       category:{mobiles,laptops},
       name: Apple,
       store: Reliance Digitals,
       discount: 12%
     },{
       category:{electornics},
       name: Boss,
       store: chroma,
       discount: 5%
     },{
       category:{headphones,mobiles},
       name: Samsung,
       store: Universal,
       discount: 8%
     },{
       category:{headphones},
       name: HTC,
       store: Chroma,
       discount: 50%
     },
    ]

我需要一个带有响应的 solr 查询

{
  headphones: 2
  mobiles: 3
  laptops: 1
  electornics: 1
}

简单地说，我需要一个多值字段的组计数。

请帮帮我。

谢谢。

Answer 1

试试这个：

?q=*:*&facet=true&facet.field=category

确保多值字段已编入索引。