有没有办法覆盖 ModelAdmin 中的 delete_selected 方法但保持确认? [英] Is there a way to override the delete_selected method in ModelAdmin but keep confirmation?
问题描述
我有:
class Person(admin.ModelAdmin):
actions = ['delete_selected']
def delete_selected(modeladmin, request, queryset):
# Show confirmation page.
for obj in queryset:
obj.custom_delete()
我留下的评论是我苦苦挣扎的地方.我仍然想在执行自定义删除之前显示确认页面.
That comment I left there is where I'm struggling. I still want to show the confirmation page before I perform my custom delete.
推荐答案
简答:你应该重写 delete_queryset
[Django-doc],因为它封装了删除对象的真正逻辑.
Short answer: you should override delete_queryset
[Django-doc], since this encapsulates the real logic to remove the objects.
您应该不覆盖delete_selected
.此操作是 定义为 [GitHub]:
You should not override delete_selected
. This action is defined like [GitHub]:
def delete_selected(modeladmin, request, queryset):
# ...
# 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
# ...
context = {
# ...
}
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.allowed_permissions = ('delete',)
delete_selected.short_description = gettext_lazy("Delete selected %(verbose_name_plural)s")
这里的关键部分是此操作将执行正确的检查,但删除本身是通过调用完成的:
The key part here is that this action will perform the proper checks, but the deletion itself is done through a call:
modeladmin.delete_queryset(request, queryset)
所以重写 delete_queryset
就足够了,用:
So it is sufficient to override delete_queryset
instead, with:
class PersonAdmin(admin.ModelAdmin):
actions = ['delete_selected']
def delete_queryset(self, request, queryset):
for obj in queryset:
obj.custom_delete()
一个 ModelAdmin
有一个 delete_queryset
[GitHub] 的标准实现:
A ModelAdmin
has a standard implementation for delete_queryset
[GitHub]:
class ModelAdmin(BaseModelAdmin):
# ...
def delete_queryset(self, request, queryset):
"""Given a queryset, delete it from the database."""
queryset.delete()
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