[FIX] Count filtered records before applying the limit

allianceauth/framework/datatables.py

@@ -195,6 +195,9 @@ class DataTablesView(View):
             *self.get_order(table_conf)
         )
 
+        # Get the count after filtering
+        qs_count = qs.count()
+
         # build output
         if length > 0:
             qs = qs[start:limit]
@@ -210,7 +213,7 @@ class DataTablesView(View):
         datatables_data = {}
         datatables_data['draw'] = draw
         datatables_data['recordsTotal'] = self.get_model_qs(request, *args, **kwargs).all().count()
-        datatables_data['recordsFiltered'] = qs.count()
+        datatables_data['recordsFiltered'] = qs_count
         datatables_data['data'] = items
 
         return JsonResponse(datatables_data)

allianceauth/framework/tests/test_datatables.py

@@ -144,6 +144,16 @@ class TestDataTables(TestCase):
         self.assertEqual(data[0][0], "1001")
         self.assertEqual(data[19][0], "1020")
 
+    def test_records_filtered(self):
+        self.get_params["length"] = "20"
+        self.client.force_login(self.user)
+        request = self.factory.get('/fake-url/', data=self.get_params)
+        response = TestView()
+        response.setup(request)
+        content = json.loads(response.get(request).content)
+        self.assertEqual(content["recordsFiltered"], 20)
+        self.assertEqual(content["recordsTotal"], 20)
+
     def test_view_global_search(self):
         self.get_params["search[value]"] = "1020"
         self.client.force_login(self.user)