如何在Django Admin中实现数据汇总和分析

from django.db import models

class Product(models.Model):
    name = models.CharField(max_length=200)
    price = models.DecimalField(max_digits=10, decimal_places=2)
    quantity = models.IntegerField()

from django.contrib import admin
from django.db.models import Sum, Avg

from .models import Product

class ProductAdmin(admin.ModelAdmin):
    list_display = ('name', 'price', 'quantity', 'total_income', 'avg_price')

    def total_income(self, obj):
        return obj.price * obj.quantity
    total_income.short_description = 'Income'
    total_income.admin_order_field = 'total_income'

    def avg_price(self, obj):
        return obj.price / obj.quantity
    avg_price.short_description = 'Avg Price'
    avg_price.admin_order_field = 'avg_price'

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        qs = qs.annotate(total_income=Sum('price') * Sum('quantity'), avg_price=Avg('price') / Avg('quantity'))
        return qs

admin.site.register(Product, ProductAdmin)