lib/elasticsearch/model/multimodel.rb in elasticsearch-model-7.1.1 vs lib/elasticsearch/model/multimodel.rb in elasticsearch-model-7.1.2.pre

@@ -83,10 +83,10 @@
       # Get an Array of document types used for retrieving documents when doing a search across multiple models
       #
       # @return [Array] the list of document types used for retrieving documents
       #
       def document_type
-        models.map { |m| m.document_type }
+        models.map { |m| m.document_type }.compact.presence
       end
 
       # Get the client common for all models
       #
       # @return Elasticsearch::Transport::Client