old_contents: # pylint: disable=C0111
  # from django.contrib import admin
  
  
  # Register your models here.
  
new_contents: # pylint: disable=C0111
  from django.contrib import admin
  from .models import Order, OrderItem, OrderStateChange
  
  
  class OrderItemInline(admin.TabularInline):  # noqa
      model = OrderItem
  
  
  class OrderStateChangeInline(admin.TabularInline):  # noqa
      model = OrderStateChange
  
  
  class OrderAdmin(admin.ModelAdmin):  # noqa
      list_fields = ('coordinator', 'restaurant_name')
      inlines = [
          OrderItemInline,
          OrderStateChangeInline,
      ]
  
  
  admin.site.register(Order, OrderAdmin)
  
subject: Add django admin for order model