在Nest 1.7.1中,Delete或DeleteByQuery无效

下面是一个工作示例

void Main()
{
    var settings = new ConnectionSettings(new Uri("http://localhost:9200"), "articles");
    var client = new ElasticClient(settings);

    if (client.IndexExists("articles").Exists)
    {
        client.DeleteIndex("articles");
    }

    client.CreateIndex("articles", c => c
        .AddMapping<Article>(m => m
            .MapFromAttributes()
        )
    );

    var today = DateTime.Now.Date;

    var article1 = CreateArticle(1111, today);
    var article2 = CreateArticle(2222, today);
    var article3 = CreateArticle(3333, today);
    var article4 = CreateArticle(4444, today);

    var bulkRequest = new BulkDescriptor();
    bulkRequest.Index<Article>(i => i.Document(article1));
    bulkRequest.Index<Article>(i => i.Document(article2));
    bulkRequest.Index<Article>(i => i.Document(article3));
    bulkRequest.Index<Article>(i => i.Document(article4));
    bulkRequest.Refresh();

    client.Bulk(bulkRequest);

    var searchResponse = client.Search<Article>(q => q.MatchAll());

    Console.WriteLine("Documents from search: {0}. Expect 4", searchResponse.Documents.Count());

    client.Delete(article1, d => d.Refresh());

    searchResponse = client.Search<Article>(q => q.MatchAll());
    Console.WriteLine("Documents from search {0}. Expect 3", searchResponse.Documents.Count());

    client.Delete(article2, d => d.Refresh());

    searchResponse = client.Search<Article>(q => q.MatchAll());
    Console.WriteLine("Documents from search {0}. Expect 2", searchResponse.Documents.Count());

    client.DeleteByQuery<Article>(q => q.MatchAll());

    searchResponse = client.Search<Article>(q => q.MatchAll());
    Console.WriteLine("Documents from search {0}. Expect 0", searchResponse.Documents.Count());

}

private Article CreateArticle(int id, DateTime articleDate)
{
    return  new Article()
    {
        Id = id,
        Title = "Title - Test Elastic Search",
        Summary = "Summary - Test Elastic Search",
        Body = "Body - Test Elastic Search",
        ArticleDate = articleDate,
        Author = new Author() { Id = 100, Name = "Mikey" },
        Published = true
    };
}

public class Article
{
    public int Id { get; set;}
    public string Title{ get; set;}
    public string Summary { get; set;}
    public string Body { get; set;}
    public DateTime ArticleDate { get; set; }
    public Author Author { get; set; }
    public bool Published { get; set;}
}

public class Author
{
    public int Id { get; set; }
    public string Name { get; set;}
}

结果在

Documents from search: 4. Expect 4
Documents from search 3. Expect 3
Documents from search 2. Expect 2
Documents from search 0. Expect 0

如预期的那样。

需要记住的是,Elasticsearch 最终一致 这意味着索引的文档不会出现在 搜索 结果,直到 refresh interval (默认为1秒);同样,对于删除查询,标记为删除的文档将出现在搜索结果中,直到刷新间隔结束。

对具有给定id的给定文档的GET请求 将 然而,在刷新间隔之前返回文档。

如果您需要可搜索的文档(或删除后不显示在搜索结果中),可以在操作后刷新索引,就像我对上面的批量和删除调用所做的那样,使用 .Refresh() 。您可能会在之后调用refresh 每一个 但是,我建议只在您确实需要时使用它,因为它会增加集群的开销并调用 全部的 时间可能会降低性能。

我终于成功了。

通过发送的删除请求 NEST 在小提琴中 DELETE /articlestest/article/_query 插件中的查询是这样的 DELETE /articlestest/articles/_query (文档类型名称在代码中拼写错误)。这就是为什么query没有通过删除文档 巢 糟糕的是,它甚至没有抱怨不存在的文档类型:(我花了一段时间才发现这个问题。