updated admin file with filters now

admin.py

from django.contrib import admin
from tonyonline.admin import tonyonline_admin_site
from .models import Product, ProductImage, Category


class ProductAdmin(admin.ModelAdmin):
    # define how the custom form is going to be rendered
    list_display = ['name','description','category','price', 'stock', 'available', 'date']
    list_filter = ['category'] # add this line


tonyonline_admin_site.register(Product, ProductAdmin)
tonyonline_admin_site.register(ProductImage)
tonyonline_admin_site.register(Category)