如何計算elasticsearch中嵌套字段下的文件數

Question

我是elasticsearch的新手，剛開始嘗試使用elasticsearch在nodejs上進行全文搜索。目前我有一個問題找出計數嵌套字段的項目數。例如，假設這是我的數據：

{ 
    user1: { 
    movies: [ 
     { 
     title: 'eat' 
     }, 
     { 
     title: 'drink' 
     } 
    ], 
    books: [ 
     { 
     author: 'apple' 
     } 
    ] 
    }, 
    user2: { 
    movies: [ 
     { 
     title: 'jump' 
     }, 
     { 
     title: 'punch' 
     }, 
     { 
     title: 'sleep' 
     }, 
     { 
     title: 'eat' 
     } 
    ], 
    books: [ 
     { 
     author: 'orange' 
     } 
    ] 
    } 
} 

怎麼辦多少部電影的簡單計數確實爲user1或user2的有（在此情況下，2和4）？

如果事實證明令人驚訝的困難，我仍然可以在其他地方存儲該號碼。

Answer 1

let users = { 
     user1: { 
       movies: [ 
         { 
           title: 'eat' 
         }, 
         { 
           title: 'drink' 
         } 
       ], 
       books: [ 
         { 
           author: 'apple' 
         } 
       ] 
     }, 
     user2: { 
       movies: [ 
         { 
           title: 'jump' 
         }, 
         { 
           title: 'punch' 
         }, 
         { 
           title: 'sleep' 
         }, 
         { 
           title: 'eat' 
         } 
       ], 
       books: [ 
         { 
           author: 'orange' 
         } 
       ] 
     } 
} 

console.log(`User1 count: ${users.user1.movies.length}`); 
console.log(`User2 count: ${users.user2.movies.length}`);