使用JAVA API从Elastic Search建议搜索响应中提取源数据 [英] Extract the Source data from Elastic Search Suggest Search response using JAVA API

问题描述

我正在使用Java的自动完成应用程序的Completition提示器，我能够使用JAVA api从Search响应中提取建议文本。在检查原始响应时，我看到建议响应包含_source数据（完整的文档，而不仅仅是建议字符串）。如何从建议搜索响应中提取源数据？

I am using the Completition suggester for an auto complete App in Java, I was able to extract the suggest text from the Search response using the JAVA api. While checking the raw response I saw that suggest response contain the _source data (complete document instead of just the Suggest string). How to extract the source data from the Suggest Search response ?

请在下面我用来获取建议文本的代码下查找-

Please find below the Code I have used to get the suggested text -

SearchRequest searchRequest = new SearchRequest("my_entitiy");
CompletionSuggestionBuilder suggestionBuilder = new CompletionSuggestionBuilder("nameSuggest");
suggestionBuilder.size(10).prefix(input).skipDuplicates(true);

SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.suggest(
        new SuggestBuilder().addSuggestion(SUGGESTION_NAME, suggestionBuilder));
searchRequest.source(searchSourceBuilder);
SearchResponse searchResponse = elasticClient.search(searchRequest, RequestOptions.DEFAULT);

Suggest suggest = searchResponse.getSuggest();
Suggest.Suggestion<Suggest.Suggestion.Entry<Suggest.Suggestion.Entry.Option>> suggesition =
        suggest.getSuggestion(SUGGESTION_NAME);
List<String> suggestionList =  new ArrayList<>();
for (Suggest.Suggestion.Entry<Suggest.Suggestion.Entry.Option> entry : suggesition.getEntries()) {
  for(Suggest.Suggestion.Entry.Option option:entry.getOptions()){
    suggestionList.add(option.getText().toString());
  }
}

在选项中，很少有方法可以提取分数，文字和突出显示。是否可以从该选项获取_source数据？我看到了 toXContent 函数是否可以使用它来获取源数据？

In the Option few methods are available to extract the score, text and highlighted. Is it possible to get the _source data from the option ? I saw a toXContent function is it possible to use that to get the source data ?

以上代码段将建议字符串保存到列表中，我想知道是否有可能获得完整的Doc JSON。

Above snippet is saving the Suggested string to a list I was wondering whether it's possible to get the complete Doc JSON.

推荐答案

您始终可以使用源过滤来过滤要在搜索结果中返回的字段。在弹性中，您可以在 _source includes ， excludes 或两者$ c>上下文。例如您只想获得 field1 和 field2 ，则可以设置 _source 以及查询：

You can always make use of source filtering to filter the fields to be returned in search results. In elastic you can do so adding includes, excludes or both in _source context. For e.g. you want only to get field1 and field2, the you can set the _source as below along with query:

{
  "query":{
    // your query goes here
  },
  "_source":{
    "includes":["field1", "field2"]
  }
}

使用高级休息客户可以达到以下效果：

Using high level rest client the same can be achieved as below:

String[] includes = {"field1", "field2"};
searchSourceBuilder.fetchSource(new FetchSourceContext(true, includes, null));

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