如何在 AWS CloudSearch 中指定搜索字段（使用 .net SDK）

Question

我有一个域，其中有 2 个可搜索字段（文字和文本字段），基本上是类别和内容。

如何指定要在字段中使用的特定字段？据我所知，它将默认搜索所有可搜索字段，但这不是我想要的（即，不想仅仅因为它在内容。）

我正在使用 .Net SDK，并且我一直在浏览他们的文档，但找不到该部分。

谢谢！

Answer 1

经过一番挖掘，指定字段的方法是使用fields数组字段。

使用.Net SDK时，可以这样：

new SearchRequest { 
   Query = query, 
   QueryOptions = @"{""fields"":[""field_name""]}" 
};

来源：https://docs.aws.amazon.com/cloudsearch/latest/developerguide/search-api.html#structured-search-syntax

Answer 2

C# 中 Cloudsearch 的示例代码并不常见，但你可以试试我写的这个

public List<AdditionalFields> Search(string query)
    {
        var batch = new List<AdditionalFields>();
        query = query.Trim();
        try
        {
            // Configure the Client that you'll use to make search requests
            string queryUrl = @"http://search-********.cloudsearch.amazonaws.com";
            var awsCredentials = new Amazon.Runtime.BasicAWSCredentials();
            AmazonCloudSearchDomainClient searchClient = new AmazonCloudSearchDomainClient(queryUrl, awsCredentials);

            SearchRequest searchRequest = new SearchRequest();
            searchRequest.Query = query;
            //searchRequest.Facet =
            //searchRequest.QueryOptions.
            searchRequest.Return = "_all_fields";

            SearchResponse searchResponse = searchClient.SearchAsync(searchRequest).Result;

            foreach (var hit in searchResponse.Hits.Hit)
            {
                var fields = new AdditionalFields();
                var searchfields = new Fields();
                searchfields.content = hit.Fields["content"][0].ToString();
                searchfields.directory = hit.Fields["directory"][0].ToString();
                searchfields.resourcename = hit.Fields["resourcename"][0].ToString();
                searchfields.title = hit.Fields["title"][0].ToString();
                fields.abridgedContent = searchfields.content.Replace(searchfields.title, string.Empty);
                searchfields.version = hit.Fields["version"][0].ToString();
                fields.abridgedContent = Abridged(fields.abridgedContent, query);
                searchfields.description = hit.Fields["description"][0].ToString();
                searchfields.resourcename = hit.Fields["resourcename"][0].ToString();
                searchfields.resourcetype = hit.Fields["resourcetype"][0].ToString();
                fields.url = "/bookviewer?bookValue=" + searchfields.resourcename + "&version=" + searchfields.version + "&chapterFolder=" + searchfields.directory + "&firstChapterNo=" + searchfields.description + ".htm";
                fields.fields = searchfields;
                batch.Add(fields);
            }

            // return searchResponse.Status.ToString();
        }
        catch (AmazonCloudSearchDomainException ex)
        {
            var fields = new AdditionalFields();
            fields.error = "ERROR : " + ex.Message;

            batch.Add(fields);

        }
        catch (Exception ex)
        {
            var fields = new AdditionalFields();
            fields.error = "ERROR : " + ex.Message;
            batch.Add(fields);
        }

        return batch;
    }