solr：按多值字段分組

Question

我有一個solr doc結構

   [
     {
       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%
     },
    ]

我需要一個帶有響應的solr查詢

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

簡單地說，我需要對多值字段進行分組計數。

請幫我解決一下這個。

謝謝。

Answer 1

嘗試這個：

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

確保索引多值字段。