django-parler integrates smoothly with the Django administration site. It includes a TranslatableAdmin class that overrides the ModelAdmin class provided by Django to manage model translations.

Edit the admin.py file of the shop application and add the following import to it:

from parler.admin import TranslatableAdmin

Modify the CategoryAdmin and ProductAdmin classes to inherit from TranslatableAdmin instead of ModelAdmin. django-parler doesn't support the prepopulated_fields attribute, but it does support the get_prepopulated_fields() method that provides the same functionality. Let's change this accordingly. Edit the admin.py file to make it look as follows:

from django.contrib import admin
from .models import Category, Product
from parler.admin import TranslatableAdmin

@admin.register(Category)
class CategoryAdmin(TranslatableAdmin):
    list_display = ['name', 'slug']

    def get_prepopulated_fields(self, request, obj=None):
        return {'slug': ('name',)}

@admin.register(Product)
class ProductAdmin(TranslatableAdmin):
    list_display = ['name', 'slug', 'price',
                    'available', 'created', 'updated']
    list_filter = ['available', 'created', 'updated']
    list_editable = ['price', 'available']

    def get_prepopulated_fields(self, request, obj=None):
        return {'slug': ('name',)}

We have adapted the administration site to work with the new translated models. We can now sync the database with the model changes that we made.