Django 中默认的“删除选定”管理操作

Question

如何在 Django 管理面板中删除或更改默认管理操作“删除选定的 X 项”的详细名称？

Answer 1

作为 Googol 解决方案的替代方案，通过等待 delete_model() 到 be implemented in current Django version ，我建议使用以下代码。

它仅禁用当前 AdminForm 的默认删除操作。

class FlowAdmin(admin.ModelAdmin):
    actions = ['delete_model']

    def get_actions(self, request):
        actions = super(MyModelAdmin, self).get_actions(request)
        del actions['delete_selected']
        return actions

    def delete_model(self, request, obj):
        for o in obj.all():
            o.delete()
    delete_model.short_description = 'Delete flow'

admin.site.register(Flow, FlowAdmin)

Answer 2

您可以使用此代码禁止该操作出现。

from django.contrib import admin
admin.site.disable_action('delete_selected')

如果您选择，您可以使用以下方法在单个模型上恢复它：

class FooAdmin(admin.ModelAdmin):
    actions = ['my_action', 'my_other_action', admin.actions.delete_selected]

Answer 3

不确定这种猴子修补是否是一个好主意，但将它推到我的admin.py 之一对我有用：

from django.contrib.admin.actions import delete_selected
delete_selected.short_description = u'How\'s this for a name?'

这将更改您的管理站点所有的详细名称。如果您只想为某个特定模型的管理员更改它，我认为您需要写一个custom admin action。

使用 Django 1.1 版测试：

>>> import django
>>> django.VERSION
(1, 1, 0, 'beta', 1)

Answer 4

为了替换 delete_selected 我执行以下操作：

将函数 delete_selected 从 contrib/admin/actions.py 复制到您的 admin.py 并重命名。还将模板contrib/admin/templates/delete_selected_confirmation.html 复制到您的模板目录并重命名。我的看起来像这样：

def reservation_bulk_delete(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 delets 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

    # Populate deletable_objects, a data structure of all related objects that
    # will also be deleted.

    # deletable_objects must be a list if we want to use '|unordered_list' in the template
    deletable_objects = []
    perms_needed = set()
    i = 0
    for obj in queryset:
        deletable_objects.append([mark_safe(u'%s: <a href="%s/">%s</a>' % (escape(force_unicode(capfirst(opts.verbose_name))), obj.pk, escape(obj))), []])
        get_deleted_objects(deletable_objects[i], perms_needed, request.user, obj, opts, 1, modeladmin.admin_site, levels_to_root=2)
        i=i+1

    # 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_unicode(obj)

                obj.delete()

                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)
            })
        # Return None to display the change list page again.
        return None

    context = {
        "title": _("Are you sure?"),
        "object_name": force_unicode(opts.verbose_name),
        "deletable_objects": deletable_objects,
        'queryset': queryset,
        "perms_lacking": perms_needed,
        "opts": opts,
        "root_path": modeladmin.admin_site.root_path,
        "app_label": app_label,
        'action_checkbox_name': helpers.ACTION_CHECKBOX_NAME,
    }

    # Display the confirmation page
    return render_to_response(modeladmin.delete_confirmation_template or [
        "admin/%s/%s/reservation_bulk_delete_confirmation.html" % (app_label, opts.object_name.lower()),
        "admin/%s/reservation_bulk_delete_confirmation.html" % app_label,
        "admin/reservation_bulk_delete_confirmation.html"
    ], context, context_instance=template.RequestContext(request))

如你所见，我注释掉了

queryset.delete()

宁可使用：

obj.delete()

这还不是最优的——你应该对整个查询集应用一些东西以获得更好的性能。

在 admin.py 中，我禁用了整个管理站点的默认操作 delete_selected：

admin.site.disable_action('delete_selected')

相反，我在需要时使用我自己的函数：

class ReservationAdmin(admin.ModelAdmin):
    actions = [reservation_bulk_delete, ]

在我的模型中，我定义了delete() 函数：

class Reservation(models.Model):
    def delete(self):
        self.status_server = RESERVATION_STATUS_DELETED
        self.save()

Answer 5

对于全局更改 delete_selected 的 short_description Dominic Rodger 的 answer 似乎最好。

但是，对于在管理员上为单个模型更改 short_description，我认为Stéphane 的answer 的替代方案更好：

def get_actions(self, request):
    actions = super().get_actions(request)
    actions['delete_selected'][0].short_description = "Delete Selected"
    return actions

Answer 6

http://docs.djangoproject.com/en/dev/ref/contrib/admin/actions/#disabling-a-site-wide-action

Answer 7

from django.contrib.admin import sites
from django.contrib.admin.actions import delete_selected


class AdminSite(sites.AdminSite):
    """
    Represents the administration, where only authorized users have access.
    """
    def __init__(self, *args, **kwargs):
        super(AdminSite, self).__init__(*args, **kwargs)
        self.disable_action('delete_selected')
        self.add_action(self._delete_selected, 'delete_selected')

    @staticmethod
    def _delete_selected(modeladmin, request, queryset):
        _delete_qs = queryset.delete

        def delete():
            for obj in queryset:
                modeladmin.delete_model(request, obj)
            _delete_qs()

        queryset.delete = delete
        return delete_selected(modeladmin, request, queryset)

Answer 8

class FooAdmin(sites.AdminSite):
        not_deleted = ['value1', 'value2']
        actions = ['delete_selected_values']

    def delete_selected_values(self, request, queryset):
        # my custom logic
        exist = queryset.filter(value__in=self.not_deleted).exists()
        if exist:
            error_message = "Error"
            self.message_user(request, error_message, level=messages.ERROR)
        else:
            delete_action = super().get_action('delete_selected')[0]
            return delete_action(self, request, queryset)
    delete_selected_values.short_description = 'delete selected'

admin.site.register(Foo, FooAdmin)