.Net Core Azure 认知搜索删除文档

Question

我在我的 .Net Core 3.1 应用程序中使用 Azure.Search.Documents 包来实现 azure 认知搜索。我有要求必须从文档中删除现有数据。我通过参考文档尝试了几种方法，但都没有用。

我尝试了以下方法

方法一

var searchIndexClient = new SearchIndexClient(new Uri(<URI>), new AzureKeyCredential("XYZ"));

var searchClient = searchIndexClient.GetSearchClient(indexName);
var options = new IndexDocumentsOptions { ThrowOnAnyError = true };
var res = await searchClient.DeleteDocumentsAsync("Id", new List<string> { "1", "2", "3"}, options);

方法二：

var searchIndexClient = new SearchIndexClient(new Uri(<URI>), new AzureKeyCredential("XYZ"));

var searchClient = searchIndexClient.GetSearchClient(indexName);

var batch = IndexDocumentsBatch.Delete("Id", documents);

var options = new IndexDocumentsOptions { ThrowOnAnyError = true };
var res = await searchClient.IndexDocumentsAsync(batch, options);

当我尝试这些方法时，出现以下错误：

{
    "error": {
        "code": "MissingRequiredParameter",
        "message": "The request is invalid. Details: actions : No indexing actions found in the request. Please include between 1 and 32000 indexing actions in your request.",
        "details": [{
                "code": "MissingIndexDocumentsActions",
                "message": "No indexing actions found in the request. Please include between 1 and 32000 indexing actions in your request. Parameters: actions"
            }
        ]
    }
}

感谢任何帮助，注意：我只想使用 SDK 而不是 Rest API

Answer 1

DeleteDocumentsAsync 将删除一个完整文档或批量删除一个文档。 IndexDocumentsBatch.Delete会根据索引中的key或字符串值进行批量删除文档。

这些方法都不会删除文档字段值，只会删除完整文档。如果您需要从文档中删除现有字段，请考虑 IndexDocumentsAction.Merge 并确保您要删除的字段为空，以便合并在必填字段中添加空值并保留其余字段。

更多信息在这里：https://learn.microsoft.com/azure/search/search-howto-dotnet-sdk