Django学习笔记之为Model添加Action

class Story(models.Model):#编辑Story状态  STATUS_CHOICES = (    (1, '待编辑状态'),    (2, '待批准状态'),    (3, '已发布状态'),    (4, '已存档'),  )  title = models.CharField(max_length=100, verbose_name=u'文章')  slug = models.SlugField(verbose_name=u'简短标题')  category =models.ForeignKey(Category, verbose_name=u'分类')  owner = models.ForeignKey(User, verbose_name=u'发布者')  status = models.IntegerField(choices=STATUS_CHOICES, default=1, verbose_name=u'发布状态')    class Meta:      ordering = ['modified','created']      verbose_name_plural = verbose_name = '文章'  def __str__(self):    return self.title

class StoryAdmin(admin.ModelAdmin):  list_display = ('title', 'owner', 'status', 'created', 'modified','read_times','top', 'id')  search_fields = ('title', 'markdown_content')  # 状态选择器  list_filter = ('status', 'owner', 'created', 'modified',)  prepopulated_fields = {'slug': ('title',)}  actions = ['make_story_public']  def make_story_public(self, request, queryset):    # queryset参数为选中的Story对象    rows_updated = queryset.update(status=3)    message_bit = "%s 篇文章" % rows_updated    self.message_user(request, "%s 已成功标记为已发布状态." % message_bit)  make_story_public.short_description = u'修改选中文章为已发布状态'