我将以下文档存储在 flex 搜索中
{"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" }'
我想搜索并仅检索一个字段(在此示例中为“查看文本”)。我正在使用以下代码
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结果= client.execute(search);
但我不断收到错误-
{"error":{"root_cause":[{"type":"parsing_exception","reason":"Deprecated field [fields] used, expected [stored_fields] instead","line":10,"col":14}],
这里缺少什么?我们还如何只检索特定字段而不是像Json那样检索所有字段?
谢谢
沙布纳
最佳答案
如错误消息中所述,不建议直接访问fields
。使用 source
filtering代替:
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();
关于elasticsearch - 在elasticSearch中使用RestClient检索特定字段,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45597278/