Implement hybrid filtering strategy for parks and rides

- Added comprehensive documentation for hybrid filtering implementation, including architecture, API endpoints, performance characteristics, and usage examples.
- Developed a hybrid pagination and client-side filtering recommendation, detailing server-side responsibilities and client-side logic.
- Created a test script for hybrid filtering endpoints, covering various test cases including basic filtering, search functionality, pagination, and edge cases.

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

@@ -230,6 +230,151 @@ class ParkPhotoSerializer(serializers.ModelSerializer):
         )
 
 
+class HybridParkSerializer(serializers.ModelSerializer):
+    """
+    Enhanced serializer for hybrid filtering strategy.
+    Includes all filterable fields for client-side filtering.
+    """
+    
+    # Location fields from related ParkLocation
+    city = serializers.SerializerMethodField()
+    state = serializers.SerializerMethodField()
+    country = serializers.SerializerMethodField()
+    continent = serializers.SerializerMethodField()
+    latitude = serializers.SerializerMethodField()
+    longitude = serializers.SerializerMethodField()
+    
+    # Company fields
+    operator_name = serializers.CharField(source="operator.name", read_only=True)
+    property_owner_name = serializers.CharField(source="property_owner.name", read_only=True, allow_null=True)
+    
+    # Image URLs for display
+    banner_image_url = serializers.SerializerMethodField()
+    card_image_url = serializers.SerializerMethodField()
+    
+    # Computed fields for filtering
+    opening_year = serializers.IntegerField(read_only=True)
+    search_text = serializers.CharField(read_only=True)
+    
+    @extend_schema_field(serializers.CharField(allow_null=True))
+    def get_city(self, obj):
+        """Get city from related location."""
+        try:
+            return obj.location.city if hasattr(obj, 'location') and obj.location else None
+        except AttributeError:
+            return None
+    
+    @extend_schema_field(serializers.CharField(allow_null=True))
+    def get_state(self, obj):
+        """Get state from related location."""
+        try:
+            return obj.location.state if hasattr(obj, 'location') and obj.location else None
+        except AttributeError:
+            return None
+    
+    @extend_schema_field(serializers.CharField(allow_null=True))
+    def get_country(self, obj):
+        """Get country from related location."""
+        try:
+            return obj.location.country if hasattr(obj, 'location') and obj.location else None
+        except AttributeError:
+            return None
+    
+    @extend_schema_field(serializers.CharField(allow_null=True))
+    def get_continent(self, obj):
+        """Get continent from related location."""
+        try:
+            return obj.location.continent if hasattr(obj, 'location') and obj.location else None
+        except AttributeError:
+            return None
+    
+    @extend_schema_field(serializers.FloatField(allow_null=True))
+    def get_latitude(self, obj):
+        """Get latitude from related location."""
+        try:
+            if hasattr(obj, 'location') and obj.location and obj.location.coordinates:
+                return obj.location.coordinates[1]  # PostGIS returns [lon, lat]
+            return None
+        except (AttributeError, IndexError, TypeError):
+            return None
+    
+    @extend_schema_field(serializers.FloatField(allow_null=True))
+    def get_longitude(self, obj):
+        """Get longitude from related location."""
+        try:
+            if hasattr(obj, 'location') and obj.location and obj.location.coordinates:
+                return obj.location.coordinates[0]  # PostGIS returns [lon, lat]
+            return None
+        except (AttributeError, IndexError, TypeError):
+            return None
+    
+    @extend_schema_field(serializers.URLField(allow_null=True))
+    def get_banner_image_url(self, obj):
+        """Get banner image URL."""
+        if obj.banner_image and obj.banner_image.image:
+            return obj.banner_image.image.url
+        return None
+    
+    @extend_schema_field(serializers.URLField(allow_null=True))
+    def get_card_image_url(self, obj):
+        """Get card image URL."""
+        if obj.card_image and obj.card_image.image:
+            return obj.card_image.image.url
+        return None
+
+    class Meta:
+        model = Park
+        fields = [
+            # Basic park info
+            "id",
+            "name",
+            "slug",
+            "description",
+            "status",
+            "park_type",
+            
+            # Dates and computed fields
+            "opening_date",
+            "closing_date",
+            "opening_year",
+            "operating_season",
+            
+            # Location fields
+            "city",
+            "state", 
+            "country",
+            "continent",
+            "latitude",
+            "longitude",
+            
+            # Company relationships
+            "operator_name",
+            "property_owner_name",
+            
+            # Statistics
+            "size_acres",
+            "average_rating",
+            "ride_count",
+            "coaster_count",
+            
+            # Images
+            "banner_image_url",
+            "card_image_url",
+            
+            # URLs
+            "website",
+            "url",
+            
+            # Computed fields for filtering
+            "search_text",
+            
+            # Metadata
+            "created_at",
+            "updated_at",
+        ]
+        read_only_fields = fields
+
+
 class ParkSerializer(serializers.ModelSerializer):
     """Serializer for the Park model."""