DJANGO ADMIN Add_view, save_model, and change_view override example django admin

admin.py

from .models import Post, Picture
from .forms import PostForm


@admin.register(Post)
class PostAdmin(admin.ModelAdmin):
    ...
    
    def add_view(self, request, form_url="", extra_context=None):
        extra_context = extra_context or {}
        extra_context['form'] = self.get_form(request)
        return super(PostAdmin, self).add_view(request, form_url=form_url, extra_context=extra_context)
    
    def change_view(self, request, object_id, form_url="", extra_context=None):
        extra_context = extra_context or {}
        post = Post.objects.get(id=object_id)
        extra_context["form"] = self.get_form(instance=post, request=request)
        return super(PostAdmin, self).change_view(request, object_id, form_url=form_url, extra_context=extra_context)

    def save_model(self, request, obj, form, change):
        obj.save()
        pictures = request.FILES.getlist('pictures')
        for picture in pictures:
            Picture.objects.create(post=obj, image=picture)
        return super().save_model(request, obj, form, change)