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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.utils import get_deleted_objects, model_ngettext
from django.core.exceptions import PermissionDenied
from django.db import router
from django.template.response import TemplateResponse
from django.utils.encoding import force_text
from django.utils.translation import ugettext as _, ugettext_lazy
def delete_selected(modeladmin, request, queryset):
"""
Default action which deletes the selected objects.
This action first displays a confirmation page whichs shows all the
deleteable 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
# Check that the user has delete permission for the actual model
if not modeladmin.has_delete_permission(request):
raise PermissionDenied
using = router.db_for_write(modeladmin.model)
# Populate deletable_objects, a data structure of all related objects that
# will also be deleted.
deletable_objects, model_count, perms_needed, protected = get_deleted_objects(
queryset, opts, request.user, modeladmin.admin_site, using)
# The user has already confirmed the deletion.
# Do the deletion and return a None to display the change list view again.
if request.POST.get('post'):
if perms_needed:
raise PermissionDenied
n = queryset.count()
if n:
for obj in queryset:
obj_display = force_text(obj)
modeladmin.log_deletion(request, obj, obj_display)
queryset.delete()
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
if len(queryset) == 1:
objects_name = force_text(opts.verbose_name)
else:
objects_name = force_text(opts.verbose_name_plural)
if perms_needed or protected:
title = _("Cannot delete %(name)s") % {"name": objects_name}
else:
title = _("Are you sure?")
context = dict(
modeladmin.admin_site.each_context(request),
title=title,
objects_name=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,
)
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)
delete_selected.short_description = ugettext_lazy("Delete selected %(verbose_name_plural)s")
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