從elasticsearch檢索信息，按輸入數組的順序

Question

似乎找不到我的疑問的答案，所以我決定發佈問題，看看有人能幫助我。

在我的應用程序中，我有一個來自後端的ID數組，它已經按我的要求排序，例如： [0] => 23，[1] => 12，[2] = > 45，[3] => 21

然後，我使用條件過濾器「詢問」elasticsearch對應於此數組中每個id的信息。問題是結果不是按照我發送的ID的順序出現的，所以結果會混淆，如：[0] => 21，[1] => 45，[2] => 23，[3 ] => 12

請注意，我無法通過對後端數組進行排序的排序對elasticsearch進行排序。

我也不能在PHP中命令它們，因爲我正在從elasticsearch中檢索分頁結果，所以如果每個oage都有2個結果，那麼elasticsearch只能給我提供[0] => 21，[1] = > 45，所以我甚至不能用php命令它們。

如何獲得輸入數組排序的結果？有任何想法嗎？

在此先感謝

Answer 1

這裏是你能做到這一點，使用自定義腳本的得分方式之一。

首先，我創建了一些假的數據：

curl -XPUT "http://localhost:9200/test_index" 

curl -XPOST "http://localhost:9200/test_index/_bulk " -d' 
{ "index" : { "_index" : "test_index", "_type" : "docs", "_id" : 1 } } 
{ "name" : "Document 1", "id" : 1 } 
{ "index" : { "_index" : "test_index", "_type" : "docs", "_id" : 2 } } 
{ "name" : "Document 2", "id" : 2 } 
{ "index" : { "_index" : "test_index", "_type" : "docs", "_id" : 3 } } 
{ "name" : "Document 3", "id" : 3 } 
{ "index" : { "_index" : "test_index", "_type" : "docs", "_id" : 4 } } 
{ "name" : "Document 4", "id" : 4 } 
{ "index" : { "_index" : "test_index", "_type" : "docs", "_id" : 5 } } 
{ "name" : "Document 5", "id" : 5 } 
{ "index" : { "_index" : "test_index", "_type" : "docs", "_id" : 6 } } 
{ "name" : "Document 6", "id" : 6 } 
{ "index" : { "_index" : "test_index", "_type" : "docs", "_id" : 7 } } 
{ "name" : "Document 7", "id" : 7 } 
{ "index" : { "_index" : "test_index", "_type" : "docs", "_id" : 8 } } 
{ "name" : "Document 8", "id" : 8 } 
{ "index" : { "_index" : "test_index", "_type" : "docs", "_id" : 9 } } 
{ "name" : "Document 9", "id" : 9 } 
{ "index" : { "_index" : "test_index", "_type" : "docs", "_id" : 10 } } 
{ "name" : "Document 10", "id" : 10 } 
' 

我用，即使它是多餘的，因爲"_id"場被轉換爲字符串，並且腳本是整數容易的"id"場。

您可以通過ID與ids過濾器取回一組特定的文檔中：

curl -XPOST "http://localhost:9200/test_index/_search" -d' 
{ 
    "filter": { 
     "ids": { 
     "type": "docs", 
     "values": [ 1, 8, 2, 5 ] 
     } 
    } 
}' 

但這些不一定會按你想要的順序。使用script based scoring，您可以根據文檔ID定義自己的排序。

在這裏我傳入一個參數，該參數是與ID相關的對象列表。評分腳本只是遍歷它們，直到找到當前文檔ID並返回該文檔的預定分數（或者如果未列出，則返回0）。

curl -XPOST "http://localhost:9200/test_index/_search" -d' 
{ 
    "filter": { 
     "ids": { 
     "type": "docs", 
     "values": [ 1, 8, 2, 5 ] 
     } 
    }, 
    "sort" : { 
     "_script" : { 
      "script" : "for(i:scoring) { if(doc[\"id\"].value == i.id) return i.score; } return 0;", 
      "type" : "number", 
      "params" : { 
       "scoring" : [ 
        { "id": 1, "score": 1 }, 
        { "id": 8, "score": 2 }, 
        { "id": 2, "score": 3 }, 
        { "id": 5, "score": 4 } 
       ] 
      }, 
      "order" : "asc" 
     } 
    } 
}' 

和文件以正確的順序返回：

{ 
    "took": 11, 
    "timed_out": false, 
    "_shards": { 
     "total": 2, 
     "successful": 2, 
     "failed": 0 
    }, 
    "hits": { 
     "total": 4, 
     "max_score": null, 
     "hits": [ 
     { 
      "_index": "test_index", 
      "_type": "docs", 
      "_id": "1", 
      "_score": null, 
      "_source": { 
       "name": "Document 1", 
       "id": 1 
      }, 
      "sort": [ 
       1 
      ] 
     }, 
     { 
      "_index": "test_index", 
      "_type": "docs", 
      "_id": "8", 
      "_score": null, 
      "_source": { 
       "name": "Document 8", 
       "id": 8 
      }, 
      "sort": [ 
       2 
      ] 
     }, 
     { 
      "_index": "test_index", 
      "_type": "docs", 
      "_id": "2", 
      "_score": null, 
      "_source": { 
       "name": "Document 2", 
       "id": 2 
      }, 
      "sort": [ 
       3 
      ] 
     }, 
     { 
      "_index": "test_index", 
      "_type": "docs", 
      "_id": "5", 
      "_score": null, 
      "_source": { 
       "name": "Document 5", 
       "id": 5 
      }, 
      "sort": [ 
       4 
      ] 
     } 
     ] 
    } 
} 

這裏是一個可運行的例子：http://sense.qbox.io/gist/01b28e5c038c785f0844abb7c01a71d69a32a2f4