如何删除索引中的所有文档

Question

有没有简单的方法从Azure搜索索引中删除所有文档(或筛选的列表或文档)？

我知道明显的答案是删除并重新创建索引,但我想知道是否还有其他选项.

Answer 1

不,目前无法从索引中删除所有文档.因为您怀疑删除并重新创建索引是要走的路.对于非常小的索引,您可以考虑单独删除文档,但考虑到应用程序通常具有用于创建索引的代码,删除/重新创建是最快的路径.

Answer 2

有一个办法：查询所有文档，用IndexBatch删除这些家伙。

    public void DeleteAllDocuments()
    {
        // Get index
        SearchIndexClient indexClient = new SearchIndexClient(SearchServiceName, SearchServiceIndex, new SearchCredentials(SearchServiceQueryApiKey));

        // Query all
        DocumentSearchResult<Document> searchResult;
        try
        {
            searchResult = indexClient.Documents.Search<Document>(string.Empty);
        }
        catch (Exception ex)
        {
            throw new Exception("Error during AzureSearch");
        }

        List<string> azureDocsToDelete =
            searchResult
                .Results
                .Select(r => r.Document["id"].ToString())
                .ToList();

        // Delete all
        try
        {
            IndexBatch batch = IndexBatch.Delete("id", azureDocsToDelete);
            var result = indexClient.Documents.Index(batch);
        }
        catch (IndexBatchException ex)
        {
            throw new Exception($"Failed to delete documents: {string.Join(", ", ex.IndexingResults.Where(r => !r.Succeeded).Select(r => r.Key))}");
        }
    }