do not override filter_queryset on viewsets (#746)

[#188679583]

tracker/api/views/country.py

@@ -45,7 +45,8 @@ def __init__(self, country=None, *args, **kwargs):
         self.country = country
         super().__init__(*args, **kwargs)
 
-    def filter_queryset(self, queryset):
+    def get_queryset(self):
+        queryset = super().get_queryset()
         if self.country:
             queryset = queryset.filter(country=self.country)
         return queryset

tracker/api/views/donation_bids.py

@@ -18,7 +18,8 @@ def __init__(self, *args, donation=None, bid=None, **kwargs):
         self.bid = bid
         super().__init__(*args, **kwargs)
 
-    def filter_queryset(self, queryset):
+    def get_queryset(self):
+        queryset = super().get_queryset()
         # this can be filtered in multiple ways
         # - by donation, which excludes hidden children unless explicitly asked for
         # - by exact bid, which includes the descendant tree if there is one, excluding

tracker/api/views/milestone.py

@@ -26,8 +26,8 @@ def _include_hidden(self, instance=None):
             isinstance(instance, Milestone) and instance.visible
         ) or 'all' in self.request.query_params
 
-    def filter_queryset(self, queryset):
+    def get_queryset(self):
         queryset = super().get_queryset()
         if not (self.detail or 'all' in self.request.query_params):
             queryset = queryset.filter(visible=True)
-        return super().filter_queryset(queryset)
+        return queryset