text: from django.contrib import admin
  from .models import Coupon
  
  
  @admin.register(Coupon)
  class CouponAdmin(admin.ModelAdmin):
      list_display = ['code', 'valid_from', 'valid_to',
                      'discount', 'active']
      list_filter = ['active', 'valid_from', 'valid_to']
      search_fields = ['code']
  
  