Return 0 instead of None for EmptySearch

Author: barseghyanartur

docker-compose.yml

@@ -7,7 +7,6 @@ services:
     build:
       context: .
       dockerfile: ./docker/elasticsearch/Dockerfile
-    image: docker.elastic.co/elasticsearch/elasticsearch:7.5.2
     volumes:
     - esdata:/usr/share/elasticsearch/data
     ports:

docker/backend/Dockerfile

@@ -1,13 +1,13 @@
-FROM docker.io/python:3.6.7-slim-jessie
+FROM docker.io/python:3.9-slim-bullseye
 ENV PYTHONUNBUFFERED 1
 
 RUN apt-get update
 RUN apt-get install -y build-essential
 RUN apt-get install -y cmake
 RUN apt-get install -y libpq-dev
-RUN apt-get install -y python-dev
-RUN apt-get install -y python-pip
-RUN apt-get install -y python-imaging
+#RUN apt-get install -y python-dev
+#RUN apt-get install -y python-pip
+#RUN apt-get install -y python-imaging
 RUN apt-get install -y mc
 RUN apt-get install -y nano
 

examples/requirements/debug.txt

@@ -36,7 +36,7 @@ simplegeneric==0.8.1
     # via ipython
 six==1.16.0
     # via prompt-toolkit
-traitlets==5.0.5
+traitlets==4.3
     # via ipython
 wcwidth==0.2.5
     # via prompt-toolkit

examples/requirements/dev.txt

@@ -162,7 +162,7 @@ sqlparse==0.4.1
     #   django-debug-toolbar
 toml==0.10.2
     # via pylint
-traitlets==5.0.5
+traitlets==4.3
     # via ipython
 urllib3==1.26.6
     # via requests

examples/requirements/elastic_docker.txt

@@ -0,0 +1,25 @@
+#
+# This file is autogenerated by pip-compile with python 3.9
+# To update, run:
+#
+#    pip-compile elastic_docker.in
+#
+django-elasticsearch-dsl==7.1.1
+    # via -r elastic_docker.in
+elasticsearch==7.5.1
+    # via
+    #   -r elastic_docker.in
+    #   elasticsearch-dsl
+elasticsearch-dsl==7.1.0
+    # via
+    #   -r elastic_docker.in
+    #   django-elasticsearch-dsl
+python-dateutil==2.8.2
+    # via elasticsearch-dsl
+six==1.16.0
+    # via
+    #   django-elasticsearch-dsl
+    #   elasticsearch-dsl
+    #   python-dateutil
+urllib3==1.26.9
+    # via elasticsearch

examples/simple/factories/books_galaxy.py

@@ -1,4 +1,5 @@
-from factory import DjangoModelFactory, SubFactory
+from factory import SubFactory
+from factory.django import DjangoModelFactory
 
 from books.models import Galaxy
 

examples/simple/factories/books_planet.py

@@ -1,4 +1,5 @@
-from factory import DjangoModelFactory, SubFactory
+from factory import SubFactory
+from factory.django import DjangoModelFactory
 
 from books.models import Planet
 

examples/simple/search_indexes/urls.py

@@ -16,6 +16,7 @@
     BookMoreLikeThisNoOptionsDocumentViewSet,
     BookMultiMatchOptionsPhasePrefixSearchFilterBackendDocumentViewSet,
     BookMultiMatchSearchFilterBackendDocumentViewSet,
+    BookNoRecordsDocumentViewSet,
     BookOrderingByScoreCompoundSearchBackendDocumentViewSet,
     BookOrderingByScoreDocumentViewSet,
     BookPermissionsDocumentViewSet,
@@ -80,7 +81,11 @@
     BookDocumentViewSet,
     basename='bookdocument'
 )
-
+router.register(
+    r'books-no-records',
+    BookNoRecordsDocumentViewSet,
+    basename='bookdocument-no-records'
+)
 router.register(
     r'books-query-friendly-pagination',
     QueryFriendlyPaginationBookDocumentViewSet,

examples/simple/search_indexes/viewsets/book/__init__.py

@@ -10,6 +10,7 @@
 from .more_like_this import *
 from .multi_match import *
 from .multi_match_options_phrase_prefix import *
+from .no_records import *
 from .ordering_by_score import *
 from .ordering_by_score_compound_search import *
 from .permissions import *

examples/simple/search_indexes/viewsets/book/no_records.py

@@ -0,0 +1,16 @@
+from django_elasticsearch_dsl_drf.utils import EmptySearch
+
+from .default import BookDocumentViewSet
+
+__all__ = (
+    'BookNoRecordsDocumentViewSet',
+)
+
+
+class BookNoRecordsDocumentViewSet(BookDocumentViewSet):
+    """Book document view set based on compound search backend."""
+
+    def get_queryset(self):
+        queryset = EmptySearch()
+        queryset.model = self.document.Django.model
+        return queryset