huge updates

app/routers.py

@@ -0,0 +1,69 @@
+from django.conf import settings
+from django.db import models
+from django.core.cache import cache
+
+class DatabaseRouter:
+    """
+    A router to control database operations and optimize query routing
+    """
+    
+    def db_for_read(self, model, **hints):
+        """
+        Route read operations to the appropriate database
+        """
+        # Check if model has a cached query
+        cache_key = f"db_read_{model._meta.model_name}"
+        cached_db = cache.get(cache_key)
+        if cached_db:
+            return cached_db
+            
+        # Default to primary database
+        return 'default'
+
+    def db_for_write(self, model, **hints):
+        """
+        Route write operations to the appropriate database
+        """
+        return 'default'
+
+    def allow_relation(self, obj1, obj2, **hints):
+        """
+        Allow relations between objects
+        """
+        return True
+
+    def allow_migrate(self, db, app_label, model_name=None, **hints):
+        """
+        Allow migrations on the default database
+        """
+        return db == 'default'
+
+    def optimize_query(self, queryset, **hints):
+        """
+        Optimize the query based on model and hints
+        """
+        # Add select_related for foreign key relationships
+        if hasattr(queryset.model, '_meta'):
+            related_fields = [
+                f.name for f in queryset.model._meta.get_fields()
+                if f.is_relation and not f.many_to_many
+            ]
+            if related_fields:
+                queryset = queryset.select_related(*related_fields)
+
+        # Add prefetch_related for many-to-many relationships
+        m2m_fields = [
+            f.name for f in queryset.model._meta.get_fields()
+            if f.many_to_many
+        ]
+        if m2m_fields:
+            queryset = queryset.prefetch_related(*m2m_fields)
+
+        # Add caching for frequently accessed queries
+        if hints.get('cache', True):
+            cache_key = f"query_{queryset.model._meta.model_name}_{hash(str(queryset.query))}"
+            cached_result = cache.get(cache_key)
+            if cached_result is not None:
+                return cached_result
+
+        return queryset