custom content filter backend

apps/api/views.py

@@ -2,12 +2,14 @@
 
 import logging
 
+from django.db.models import Q
 from django_filters import rest_framework as rest_filters
 from rest_framework import permissions, filters, generics, status
 from rest_framework.response import Response
 from rest_framework.pagination import PageNumberPagination
 from rest_framework.authentication import SessionAuthentication, TokenAuthentication
 from rest_framework.parsers import MultiPartParser, FormParser
+from rest_framework.filters import BaseFilterBackend
 
 from apps.home.models import (
     Server,
@@ -39,6 +41,7 @@ class DefaultPagination(PageNumberPagination):
     """Default class for pagination in API views."""
 
     page_size = 10
+    page_query_param = "page"
     page_size_query_param = "page_size"
     max_page_size = 25
 
@@ -223,11 +226,66 @@ class Subscription_DetailView(ChangableDetailView):
 
 # region Content
 
+
+class ContentFilterBackend(BaseFilterBackend):
+    """
+    If `match_any=true` in querystring, matches 'any' params instead
+    of 'all' params.
+    """
+
+    _MATCH_ANY_PARAM = "match_any"
+    _PAGINATION_PARAMS = [
+        DefaultPagination.page_query_param,
+        DefaultPagination.page_size_query_param
+    ]
+    _SUB_PARAM = "subscription"
+
+    def filter_queryset(self, request, queryset, view):
+        match_any = request.query_params.get(self._MATCH_ANY_PARAM) == "true"
+        filters = Q()
+
+        for param, value in request.query_params.items():
+            if param == self._MATCH_ANY_PARAM or param in self._PAGINATION_PARAMS:
+                continue
+
+            query = Q(**{param: value})
+
+            if match_any and param != self._SUB_PARAM:
+                filters |= query
+            else:
+                filters &= query
+
+        return queryset.filter(filters)
+
+
 class Content_ListView(ListCreateView):
-    filterset_fields = ("id", "subscription", "subscription__server", "item_id", "item_guid", "item_url", "item_title", "item_content_hash")
-    search_fields = ("item_id", "item_guid", "item_url", "item_title", "item_content_hash")
-    ordering_fields = ("id", "subscription", "item_id", "item_guid", "item_url", "item_title", "item_content_hash")
+    search_fields = (
+        "subscription",
+        "subscription__server",
+        "item_id",
+        "item_guid",
+        "item_url",
+        "item_title",
+        "item_description",
+        "item_content_hash",
+        "item_image_url",
+        "item_thumbnail_url",
+        "item_published",
+        "item_author",
+        "item_author_url",
+        "item_feed_title",
+        "item_feed_url"
+    )
+    filterset_fields = search_fields + ("id",)
+    ordering_fields = filterset_fields
     serializer_class = ContentSerializer
+    filter_backends = [
+        ContentFilterBackend,
+        filters.SearchFilter,
+        rest_filters.DjangoFilterBackend,
+        filters.OrderingFilter
+    ]
+    # filter_backends = (FlexibleFilterBackend,)
 
     def get_queryset(self):
         if self.request.user.is_superuser: