5.7. Admin Abstract

>>> 
... from django.contrib import admin
...
... class BaseAdmin(admin.ModelAdmin):
...     pass

5.7.1. Use Case - 1

>>> 
... from django.contrib import admin
... from django.http import HttpRequest
... from django.utils.translation import gettext_lazy as _
...
...
... class BaseAdmin(admin.ModelAdmin):
...     def get_queryset(self, request: HttpRequest):
...         qs = super().get_queryset(request)
...         if request.user.is_superuser:
...             return qs
...         return qs.filter(is_deleted=False)
...
...     def get_readonly_fields(self, request: HttpRequest, obj: admin.ModelAdmin | None = None):
...         readonly_fields = super().get_readonly_fields(request, obj)
...         readonly_fields += ('uuid', 'created_date', 'created_user',  'modified_date', 'modified_user', 'is_deleted')
...         return readonly_fields
...
...     def get_list_display(self, request: HttpRequest):
...         list_display = super().get_list_display(request)
...         if request.user.is_superuser and 'is_deleted' not in list_display:
...             list_display.insert(0, 'is_deleted')
...         return list_display
...
...     def save_model(self, request: HttpRequest, obj: admin.ModelAdmin, form, change: bool):
...         if not change:
...             obj.created_user = request.user
...         obj.modified_user = request.user
...         return super().save_model(request, obj, form, change)
...
...     def delete_model(self, request, obj):
...         obj.is_deleted = True
...         obj.save()

5.7.2. Use Cae - 0x02

>>> 
... from django.contrib import admin
... from django.utils.translation import gettext_lazy as _
...
...
... admin.site.site_header = _('Dashboard')  # w nagłówku panelu administracyjnego
... admin.site.site_title = _('My Project')  # w tytule karty przeglądarki
... admin.site.index_title = _('Index Title')  # nazwa aplikacji na głównej stronie panelu administracyjnego
...
...
... class BaseAdmin(admin.ModelAdmin):
...     def get_queryset(self, request):
...         qs = super().get_queryset(request)
...         if request.user.is_superuser:
...             return qs.all()
...         return qs.filter(is_deleted=False)
...
...     def get_list_display(self, request):
...         list_display = list(super().get_list_display(request))
...         if request.user.is_superuser:
...             additional_fields = ['is_deleted', 'created_user', 'modified_user']
...             return list_display + additional_fields
...         return list_display
...
...     def get_list_filter(self, request):
...         list_filter = list(super().get_list_filter(request))
...         if request.user.is_superuser:
...             additional_fields = ['is_deleted', 'created_user', 'modified_user']
...             return list_filter + additional_fields
...         return list_filter
...
...     def save_model(self, request, obj, form, change: bool):
...         if not change:
...             # set created_user only when new object is created
...             obj.created_user = request.user
...         # set modified_user for both new and modified objects
...         obj.modified_user = request.user
...         return super().save_model(request, obj, form, change)
...
...     def delete_model(self, request, obj):
...         obj.is_deleted = True
...         return obj.save()