Elasticsearch

Question

如标题所示，我正在尝试索引 MS Word 文档并在其中进行全文搜索。

我看过几个例子，但我无法弄清楚我做错了什么。

相关代码：

[ElasticsearchType(Name = "AttachmentDocuments")]
public class Attachment
{
    [String(Name = "_content")]
    public string Content { get; set; }
    [String(Name = "_content_type")]
    public string ContentType { get; set; }
    [String(Name = "_name")]
    public string Name { get; set; }

    public Attachment(Task<File> file)
    {
        Content = file.Result.FileContent;
        ContentType = file.Result.FileType;
        Name = file.Result.FileName;
    }
}

上面的"Content"属性在构造函数中设置为"file.Result.FileContent"。 "Content" 属性是 base64 字符串。

public class Document
{
    [Number(Name = "Id")]
    public int Id { get; set; }
    [Attachment]
    public Attachment File { get; set; }
    public String Title { get; set; }
}

下面是将文档索引到elasticsearch数据库的方法。

    public void IndexDocument(Attachment attachmentDocument)
    {
        // Create the index if it does not already exist
        var indexExists = _client.IndexExists(new IndexExistsRequest(ElasticsearchIndexName));
        if (!indexExists.Exists)
        {
            var indexDescriptor =
                new CreateIndexDescriptor(new IndexName {Name = ElasticsearchIndexName}).Mappings(
                    ms => ms.Map<Document>(m => m.AutoMap()));
            _client.CreateIndex(indexDescriptor);
        }

        var doc = new Document()
        {
            Id = 1,
            Title = "Test",
            File = attachmentDocument
        };

        _client.Index(doc);
    }

基于上面的代码，文档被索引到正确的索引中（来自 Elasticsearch 主机的屏幕截图 - Searchly）：

Searchly Screenshot

文件中的内容是："VCXCVXCVXCVXCVXVXCVXCV" 并且通过以下查询，我在 return 中获得零命中：

        QueryContainer queryContainer = null;
        queryContainer |= new MatchQuery()
        {
            Field = "file",
            Query = "VCXCVXCVXCVXCVXVXCVXCV"
        };

        var searchResult =
            await _client.LowLevel.SearchAsync<string>(ApplicationsIndexName, "document", new SearchRequest()
            {
                From = 0,
                Size = 10,
                Query = queryContainer, 
                Aggregations = GetAggregations()
            });

如果有人可以提示我我做错了什么或应该调查什么，我会很感激？

提供我的 Elasticsearch 数据库中映射的屏幕截图：

Elasticsearch - Mapping

Answer 1

因为您引用了错误的字段。字段应为 file.content

 queryContainer |= new MatchQuery()
        {
            Field = "file.content",
            Query = "VCXCVXCVXCVXCVXVXCVXCV"
        };

Elasticsearch - 尝试索引 MS Word 附件并在其中进行全文搜索

Elasticsearch - Trying to index MS Word attachment & making a full text search within

elasticsearch-plugin