檢索彈性貨品搜尋

Question

使用JestClient特定的Fileds我已經存儲在

{"Book_Id" : "102" ,"Book_Name" : "Alice in wonderLand", "Review_Text" :"DescentRead","Rating_Percentage" :"100" }' 
{"Book_Id" : "102" ,"Book_Name" : "Alice in wonderLand", "Review_Text" :"For Kids","Rating_Percentage" :"50" }' 
{"Book_Id" : "103" ,"Book_Name" : "Blah Blah", "Review_Text" :"Great","Rating_Percentage" :"100" }' 

我想做一個搜索和檢索只有一個字段（在本例中審查文本）作爲出把彈性搜索下列文件。我正在使用以下代碼

SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder(); 
searchSourceBuilder.query(QueryBuilders.matchQuery("Book_Id", "102")) 
     .fields("_source.Review_Text"); 
Search search = new Search.Builder(searchSourceBuilder.toString()) 
       .addIndex("reviews") 
       .addType("bookreview") 
       .build(); 

SearchResult result = client.execute（search）;

但我不斷收到錯誤 -

{"error":{"root_cause":[{"type":"parsing_exception","reason":"Deprecated field [fields] used, expected [stored_fields] instead","line":10,"col":14}], 

這到底是怎麼失蹤了？做怎麼回事，我們只檢索特定的Fileds，而不是所有的字段爲JSON

感謝 Shabna

Answer 1

訪問fields在錯誤消息中描述直接被棄用。改爲使用source filtering：

SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder(); 
searchSourceBuilder.query(QueryBuilders.matchQuery("Book_Id", "102")) 
     .fetchSource("Review_Text", null);     <-- change this line 
Search search = new Search.Builder(searchSourceBuilder.toString()) 
       .addIndex("reviews") 
       .addType("bookreview") 
       .build();