Build errors after upgrading from Elasticsearch 5.5.0 to 7.5.1

Question

I have recently upgraded Elasticsearch.Net and NEST in my application from Version 5.5.0 to 7.5.1 and I am getting a bunch of build errors. I've managed to resolve some of them but the following ones remain unclear to me:

1) ElasticLowLevelClient.Msearch

    MultiSearchRequest multiSearchRequest = new MultiSearchRequest { Operations = operations };
    MultiSearchResponseData response = Converter.ToMultiSearchResponseData(client.Msearch<byte[]>("articles", multiSearchRequest));

Where operations is of type Dictionary<string, Nest.ISearchRequest>, I am getting the following error:

Severity Code Description Project File Line Suppression State Error CS1061 'ElasticLowLevelClient' does not contain a definition for 'Msearch' and no accessible extension method 'Msearch' accepting a first argument of type 'ElasticLowLevelClient' could be found (are you missing a using directive or an assembly reference?)

2) Elasticsearch.Net.PostData

    SearchRequest request = new SearchRequest
    {
        Size = 1,
        Query = new QueryStringQuery { DefaultField = new Field("urlName"), Query = "(" + articleUrl + ")" },
    };
    ElasticsearchResponse<string> response = client.Search<string>("detailarticle", new PostData<object>(request));

I am getting the following error:

Severity Code Description Project File Line Suppression State Error CS1729 'PostData' does not contain a constructor that takes 1 arguments

3) BulkUpdateOperation and PostDate:

public void UpdateArticlesIndex(IEnumerable<ArticleUpdateModel> articles)
{
    if (articles == null || articles.Count() == 0)
        return;

    List<IBulkOperation> operations = new List<IBulkOperation>();
    foreach (var a in articles)
    {
        operations.Add(new BulkUpdateOperation<object, object>(a.DocumentId)
        {
            Index = "articles",
            Type = "_doc",
            Doc = a.Value,
        });
    }

    BulkRequest request = new BulkRequest
    {
        Operations = operations,
    };

    client.Bulk<string>(new PostData<object>(request));
}

I am getting the following two erros:

Severity Code Description Project File Line Suppression State Error CS0117 'BulkUpdateOperation<object, object>' does not contain a definition for 'Type'

and

Severity Code Description Project File Line Suppression State Error CS1729 'PostData' does not contain a constructor that takes 1 arguments

I have tried messing with constructors and altering declarations but it did not yield any desired results. I have also looked into Elasticsearch documentation but did not find anything relevant

Any help about resolving those build errors would be highly appreciated

Answer 1

1. ElasticLowLevelClient.Msearch

   MultiSearchRequest multiSearchRequest = new MultiSearchRequest { Operations = operations }; MultiSearchResponseData response = Converter.ToMultiSearchResponseData(client.Msearch<byte[]>("articles", multiSearchRequest)); Where operations is of type Dictionary<string, Nest.ISearchRequest>, I am getting the following error:

Severity Code Description Project File Line Suppression State Error CS1061 'ElasticLowLevelClient' does not contain a definition for 'Msearch' and no accessible extension method 'Msearch' accepting a first argument of type 'ElasticLowLevelClient' could be found (are you missing a using directive or an assembly reference?)

Use MultiSearch instead of Msearch, wrap MultiSearchRequest in PostData.Serialiable and change the response type from byte[] to BytesResponse. Note that the low level client must be accessed from an instance of a high level client so that MultiSearchRequest is serialized correctly (more specifically, ConnectionSettings should be used, which is configured with a resolver that will use the correct formatter to JSON serialize MultiSearchRequest correctly)

var client = new ElasticClient();
MultiSearchRequest multiSearchRequest = new MultiSearchRequest { Operations = operations };
var response = client.LowLevel.MultiSearch<BytesResponse>("articles", PostData.Serializable(multiSearchRequest));
byte[] bytes = response.Body;

2. Elasticsearch.Net.PostData

   SearchRequest request = new SearchRequest { Size = 1, Query = new QueryStringQuery { DefaultField = new Field("urlName"), Query = "(" + articleUrl + ")" }, }; ElasticsearchResponse response = client.Search("detailarticle", new PostData(request)); I am getting the following error:

Severity Code Description Project File Line Suppression State Error CS1729 'PostData' does not contain a constructor that takes 1 arguments

Use PostData.Serializable<T>(T data) and return a StringResponse

var client = new ElasticClient();
var articleUrl = "example.com";

SearchRequest request = new SearchRequest
{
    Size = 1,
    Query = new QueryStringQuery { DefaultField = new Field("urlName"), Query = "(" + articleUrl + ")" },
};
var response = client.LowLevel.Search<StringResponse>("detailarticle", PostData.Serializable(request));
var str = response.Body;

I am getting the following two erros:

Severity Code Description Project File Line Suppression State Error CS0117 'BulkUpdateOperation<object, object>' does not contain a definition for 'Type'

and

Severity Code Description Project File Line Suppression State Error CS1729 'PostData' does not contain a constructor that takes 1 arguments

Remove Type as types are going away in Elasticsearch and have been removed in NEST 7.x for bulk requests. The client will use _doc for APIs. Similar to the answer to 2, you should wrap BulkRequest in PostData.Serializable<T>(T data)