Total Orders Per Day Calculation

This function calculates the total number of orders per day from the database. It uses Django ORM to query the database and uses the annotate method to calculate the sum.

Technology Stack : Django ORM, annotate, Sum, cache

Code Type : Database Query

Code Difficulty : Intermediate

                
                    
import random
from django.core.cache import cache
from django.utils.timezone import now
from django.db.models import Sum

def calculate_total_orders_per_day():
    """
    Calculate the total number of orders per day from the database.
    """
    # Use Django ORM to query the database
    from myapp.models import Order
    total_orders_per_day = Order.objects.annotate(
        total=Sum('quantity')
    ).values('order_date').annotate(
        total_orders=Sum('total')
    )

    # Cache the result to improve performance
    cache_key = 'total_orders_per_day'
    cache.set(cache_key, total_orders_per_day, timeout=60*60)

    return total_orders_per_day