Add custom pagination size as an API parameter

apps/api/pagination.py

@@ -0,0 +1,5 @@
+from rest_framework.pagination import PageNumberPagination
+
+class CustomPagination(PageNumberPagination):
+    page_size_query_param = 'page_size'
+

note_kfet/settings/base.py

@@ -252,7 +252,7 @@ REST_FRAMEWORK = {
         'rest_framework.authentication.TokenAuthentication',
         'oauth2_provider.contrib.rest_framework.OAuth2Authentication',
     ],
-    'DEFAULT_PAGINATION_CLASS': 'rest_framework.pagination.PageNumberPagination',
+    'DEFAULT_PAGINATION_CLASS': 'apps.api.pagination.CustomPagination',
     'PAGE_SIZE': 20,
 }