Avoid NRE in ElasticQueryService.SearchAsync()

src/OrchardCore/OrchardCore.Search.Elasticsearch.Core/ElasticsearchConstants.cs

@@ -2,7 +2,5 @@ namespace OrchardCore.Search.Elasticsearch;
 
 public class ElasticsearchConstants
 {
- public const string StandardAnalyzer = "standard";
-
  public const string DefaultAnalyzer = "standard";
 }

src/OrchardCore/OrchardCore.Search.Elasticsearch.Core/Services/ElasticIndexManager.cs

@@ -107,7 +107,6 @@ public async Task<bool> CreateIndexAsync(ElasticIndexSettings elasticIndexSettin
  if (_elasticsearchOptions.Analyzers.TryGetValue(analyzerName, out var analyzerProperties))
  {
  var analyzer = CreateAnalyzer(analyzerProperties);
- analyzersDescriptor = new AnalyzersDescriptor();
  analysisDescriptor.Analyzers(a => a.UserDefined(analyzerName, analyzer));
 
  indexSettingsDescriptor = new IndexSettingsDescriptor();

src/OrchardCore/OrchardCore.Search.Elasticsearch.Core/Services/ElasticQueryService.cs

@@ -33,6 +33,8 @@ public async Task<ElasticTopDocs> SearchAsync(string indexName, string query)
  if (_elasticClient == null)
  {
  _logger.LogWarning("Elasticsearch Client is not setup, please validate your Elasticsearch Configurations");
+
+ return elasticTopDocs;
  }
 
  try