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"""
Built-in, globally-available admin actions.
"""
from django.contrib import messages
from django.contrib.admin import helpers
from django.contrib.admin.decorators import action
from django.contrib.admin.utils import model_ngettext
from django.core.exceptions import PermissionDenied
from django.template.response import TemplateResponse
from django.utils.translation import gettext as _
from django.utils.translation import gettext_lazy
@action(
permissions=["delete"],
description=gettext_lazy("Delete selected %(verbose_name_plural)s"),
)
def delete_selected(modeladmin, request, queryset):
"""
Default action which deletes the selected objects.
This action first displays a confirmation page which shows all the
deletable objects, or, if the user has no permission one of the related
childs (foreignkeys), a "permission denied" message.
Next, it deletes all selected objects and redirects back to the change list.
"""
opts = modeladmin.model._meta
app_label = opts.app_label
# Populate deletable_objects, a data structure of all related objects that
# will also be deleted.
(
deletable_objects,
model_count,
perms_needed,
protected,
) = modeladmin.get_deleted_objects(queryset, request)
# The user has already confirmed the deletion.
# Do the deletion and return None to display the change list view again.
if request.POST.get("post") and not protected:
if perms_needed:
raise PermissionDenied
n = queryset.count()
if n:
for obj in queryset:
obj_display = str(obj)
modeladmin.log_deletion(request, obj, obj_display)
modeladmin.delete_queryset(request, queryset)
modeladmin.message_user(
request,
_("Successfully deleted %(count)d %(items)s.")
% {"count": n, "items": model_ngettext(modeladmin.opts, n)},
messages.SUCCESS,
)
# Return None to display the change list page again.
return None
objects_name = model_ngettext(queryset)
if perms_needed or protected:
title = _("Cannot delete %(name)s") % {"name": objects_name}
else:
title = _("Are you sure?")
context = {
**modeladmin.admin_site.each_context(request),
"title": title,
"subtitle": None,
"objects_name": str(objects_name),
"deletable_objects": [deletable_objects],
"model_count": dict(model_count).items(),
"queryset": queryset,
"perms_lacking": perms_needed,
"protected": protected,
"opts": opts,
"action_checkbox_name": helpers.ACTION_CHECKBOX_NAME,
"media": modeladmin.media,
}
request.current_app = modeladmin.admin_site.name
# Display the confirmation page
return TemplateResponse(
request,
modeladmin.delete_selected_confirmation_template
or [
"admin/%s/%s/delete_selected_confirmation.html"
% (app_label, opts.model_name),
"admin/%s/delete_selected_confirmation.html" % app_label,
"admin/delete_selected_confirmation.html",
],
context,
)
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