How to add categories in Django?

Question

Django

I recently started building my first Django site, it's almost done, but I need to add categories.
To be honest, I made the site based on a video lesson and I don’t understand how everything works.
Please explain how I can add categories to the site, so that I can add categories in the admin panel, when adding an article, I can choose which category to add it to, and display a list of categories on the site.
Explain as a child: what to write in which file, where to do migrations, in general, everything is in order with the code.
I found a couple of articles on the Internet on this topic, but they did not help.
I am making a website according to the course: [itproger] [Gosha Dudar] Full study of Python

Answer 1

You just need to add a Category model and link it to the Article model.
in the models.py file, where you write the article model like this

# Модель категории
class Category(models.Model):
    name = models.CharField(max_length=64, verbose_name='название')

# Модель статья
class Article(models.Model):
    category = models.ForeignKey(Category, on_delete=models.CASCADE, verbose_name='категория')
    # другие поля ....
)

It remains only to add admin.py

from .models import Category, Article

class CategoryAdmin(admin.ModelAdmin):
    list_display = ['name']

class ArticleAdmin(admin.ModelAdmin):
    list_display = ['category', ...]

admin.site.register(Category,  CategoryAdmin)
admin.site.register(Article, ArticleAdmin)

That's all. I advise you to look at more tutorials and read the documentation (there is also in Russian), well, and various other articles.