fixes:

Author: barseghyanartur

examples/simple/search_indexes/viewsets/author.py

@@ -87,14 +87,14 @@ class AuthorDocumentViewSet(DocumentViewSet):
                 FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
             ],
             'default_suggester': FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
-            'serializer_field': 'name',
+            # 'serializer_field': 'name',
         },
         'salutation.suggest': {
             'field': 'salutation.raw',
             'suggesters': [
                 FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
             ],
             'default_suggester': FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
-            'serializer_field': 'salutation',
+            # 'serializer_field': 'salutation',
         },
     }

examples/simple/search_indexes/viewsets/book.py

@@ -270,13 +270,13 @@ class BookFunctionalSuggesterDocumentViewSet(
                 FUNCTIONAL_SUGGESTER_COMPLETION_MATCH,
             ],
             'default_suggester': FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
-            'serializer_field': 'title',
+            # 'serializer_field': 'title',
         },
         'title_suggest_match': {
             'field': 'title.edge_ngram_completion',
             'suggesters': [FUNCTIONAL_SUGGESTER_COMPLETION_MATCH],
             'default_suggester': FUNCTIONAL_SUGGESTER_COMPLETION_MATCH,
-            'serializer_field': 'title',
+            # 'serializer_field': 'title',
         }
         # 'publisher_suggest': 'publisher.suggest',
         # 'tag_suggest': 'tags.suggest',

examples/simple/search_indexes/viewsets/publisher.py

@@ -123,30 +123,30 @@ class PublisherDocumentViewSet(DocumentViewSet):
                 FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
             ],
             'default_suggester': FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
-            'serializer_field': 'name',
+            # 'serializer_field': 'name',
         },
         'city_suggest': {
             'field': 'city.raw',
             'suggesters': [
                 FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
             ],
             'default_suggester': FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
-            'serializer_field': 'city',
+            # 'serializer_field': 'city',
         },
         'state_province_suggest': {
             'field': 'state_province.suggest',
             'suggesters': [
                 FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
             ],
             'default_suggester': FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
-            'serializer_field': 'state_province',
+            # 'serializer_field': 'state_province',
         },
         'country_suggest': {
             'field': 'country.raw',
             'suggesters': [
                 FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
             ],
             'default_suggester': FUNCTIONAL_SUGGESTER_COMPLETION_PREFIX,
-            'serializer_field': 'country',
+            # 'serializer_field': 'country',
         },
     }

src/django_elasticsearch_dsl_drf/filter_backends/suggester/functional.py

@@ -331,8 +331,19 @@ def get_suggester_query_params(self, request, view):
                         if __value.strip() != ''
                     ]
 
-                    serializer_field = \
-                        suggester_fields[field_name]['serializer_field']
+                    # If specific field given, use that. Otherwise,
+                    # fall back to the top level field name.
+                    if 'serializer_field' in suggester_fields[field_name]:
+                        serializer_field = \
+                            suggester_fields[field_name]['serializer_field']
+                    else:
+                        serializer_field = suggester_fields[field_name].get(
+                            'field',
+                            field_name
+                        )
+                        serializer_field = self.extract_field_name(
+                            serializer_field
+                        )
 
                     if values:
                         suggester_query_params[query_param] = {
@@ -396,6 +407,18 @@ def serialize_queryset(self,
         }
         return data
 
+    def extract_field_name(self, field_name):
+        """Extract field name.
+
+        For instance, "name.suggest" or "name.raw" becomes "name".
+
+        :param field_name:
+        :type str:
+        :return:
+        :rtype: str
+        """
+        return field_name.split('.')[0]
+
     def filter_queryset(self, request, queryset, view):
         """Filter the queryset.