尝试使用NEST搜索c＃中所有弹性搜索文档中的任何单词（没有指定字段）

Question

I am trying to search an input word in any index or document in elasticsearch using NEST in c#

I've already tried simple_string_query , match_all , _search (most basic request), none of this worked and I get every time the same error message.

var conn = new ConnectionSettings(new Uri("<elasticsearchEndpoint>))
                .DefaultIndex(model.Index)
                .DefaultTypeName(model.Type);
var client = new ElasticClient(conn);
var res = client.Search<dynamic*>(c=>c
                .AllIndices()
                .AllTypes()
                .Query(q=>q
                    .QueryString(qs=>qs.Query(model.Query)
                )
));

I've also tried with myObject class

I expect to get a list of documents that contains the input word, or at least a list of document ids.

You will find the error below :

Elasticsearch.Net.UnexpectedElasticsearchClientException : 'Cannot deserialize the current JSON object (eg {"name":"value"}) into type 'System.Int64' because the type requires a JSON primitive value (eg string, number, boolean, null) to deserialize correctly. To fix this error either change the JSON to a JSON primitive value (eg string, number, boolean, null) or change the deserialized type so that it is a normal .NET type (eg not a primitive type like integer, not a collection type like an array or List) that can be deserialized from a JSON object. JsonObjectAttribute can also be added to the type to force it to deserialize from a JSON object. Path 'hits.total.value', line 1, position 116.'

Answer 1

public class ApiModel
{
    [Required]
    [Display(Name = "Index")]
    public string Index { get; set; }
    [Required]
    [Display(Name = "Type")]
    public string Type { get; set; }
    [Required]
    [Display(Name = "Id")]
    public string Id { get; set; }
    public dynamic Body { get; set; }
    public string sent_body { get; set; }
    public bool Request { get; set; }
    public string Method { get; set; }
    public string Rody { get; set; }
    public string Query { get; set; }
}

Answer 2

It sounds to me like you are using a NEST 6.x client against Elasticsearch 7.x. This won't work because they are not compatible; in this case, I suspect it is the change to the "total" field on a search response that cannot be deserialized because in 7.x it is an object and in 6.x, it is a long .

Please use a NEST 7.x client with Elasticsearch 7.x, which is compatible. The latest at this time is 7.0.0-beta1 .