feat: Add continent and park type fields to Park and ParkLocation models; update API filters and documentation

backend/apps/api/v1/parks/park_views.py

@@ -240,10 +240,15 @@ class ParkListCreateAPIView(APIView):
         if city:
             qs = qs.filter(location__city__iexact=city)
 
-        # NOTE: continent and park_type filters are not implemented because
-        # these fields don't exist in the current Django models:
-        # - ParkLocation model has no 'continent' field
-        # - Park model has no 'park_type' field
+        # Continent filter (now available field)
+        continent = params.get("continent")
+        if continent:
+            qs = qs.filter(location__continent__iexact=continent)
+
+        # Park type filter (now available field)
+        park_type = params.get("park_type")
+        if park_type:
+            qs = qs.filter(park_type=park_type)
 
         # Status filter (available field)
         status_filter = params.get("status")
@@ -559,16 +564,24 @@ class FilterOptionsAPIView(APIView):
 
         # Try to get dynamic options from database
         try:
-            # NOTE: continent field doesn't exist in ParkLocation model, so we use static list
-            continents = [
-                "North America",
-                "South America",
-                "Europe",
-                "Asia",
-                "Africa",
-                "Australia",
-                "Antarctica"
-            ]
+            # Get continents from database (now available field)
+            continents = list(Park.objects.exclude(
+                location__continent__isnull=True
+            ).exclude(
+                location__continent__exact=''
+            ).values_list('location__continent', flat=True).distinct().order_by('location__continent'))
+
+            # Fallback to static list if no continents in database
+            if not continents:
+                continents = [
+                    "North America",
+                    "South America",
+                    "Europe",
+                    "Asia",
+                    "Africa",
+                    "Australia",
+                    "Antarctica"
+                ]
 
             countries = list(Park.objects.exclude(
                 location__country__isnull=True
@@ -582,22 +595,11 @@ class FilterOptionsAPIView(APIView):
                 location__state__exact=''
             ).values_list('location__state', flat=True).distinct().order_by('location__state'))
 
-            # Try to use ModelChoices if available
-            if HAVE_MODELCHOICES and ModelChoices is not None:
-                try:
-                    park_types = ModelChoices.get_park_type_choices()
-                except Exception:
-                    park_types = [
-                        {"value": "THEME_PARK", "label": "Theme Park"},
-                        {"value": "AMUSEMENT_PARK", "label": "Amusement Park"},
-                        {"value": "WATER_PARK", "label": "Water Park"},
-                    ]
-            else:
-                park_types = [
-                    {"value": "THEME_PARK", "label": "Theme Park"},
-                    {"value": "AMUSEMENT_PARK", "label": "Amusement Park"},
-                    {"value": "WATER_PARK", "label": "Water Park"},
-                ]
+            # Get park types from model choices (now available field)
+            park_types = [
+                {"value": choice[0], "label": choice[1]}
+                for choice in Park.PARK_TYPE_CHOICES
+            ]
 
             return Response({
                 "park_types": park_types,