Panduan Kejuruteraan: Freelance Python & Django Programmer: Eliminating ORM N+1 & Slow SQL Queries. Aldian Fazrihady ialah Programmer Bebas Kanan & Jurutera AI (Python, Django, FastAPI, React, Next.js, TypeScript, Golang).

Cut Django API response times from 3.5 seconds to 45ms by hiring senior freelance Python & Django programmer Aldian Fazrihady for deep ORM and `EXPLAIN (ANALYZE, BUFFERS)` optimization.

from django.db.models import Prefetch, OuterRef, Subquery
from orders.models import Order, OrderLineItem

def get_optimized_tenant_orders(tenant_id: int):
    active_items = OrderLineItem.objects.filter(is_cancelled=False).select_related("product")
    return (
        Order.objects.filter(tenant_id=tenant_id)
        .select_related("customer", "billing_address")
        .prefetch_related(Prefetch("line_items", queryset=active_items))
        .only("id", "order_number", "total_cents", "created_at", "customer__name", "billing_address__country")
    )

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