class CourseAdmin(object):
  # 设置列表显示字段
  list_display = ['name', 'course_org', 'detail','degree','learn_times','students','fav_nums','image','click_nums','add_time']
  # 设置列表查询字段
  search_field = ['name', 'course_org', 'detail','degree','learn_times','students','fav_nums','image','click_nums']
  # 设置列表过滤字段
  list_filter = ['name', 'course_org', 'detail','degree','learn_times','students','fav_nums','image','click_nums','add_time']
  # 设置显示图标
  model_icon = 'fa fa-check-square'
  # 设置字段可以直接在列表页修改
  list_editable=['desc','degree']
  # 设置默认排序
  ordering=['-click_nums']
  # 设置详情页面只读显示
  readonly_fields=['fav_nums','click_nums']
  # 设置详情页面不显示某个字段
  exclude=['add_time']
   #自动刷新列表页面（秒数）
  refresh_times = [3,5] 

	def queryset(self):
	    # 重载queryset方法，进行过滤
	    qs = super(CourseAdmin, self).queryset()
	    # 只显示is_banner=True的课程
	    qs = qs.filter(is_banner=False)
	    return qs 
	  
	def save_models(self):
    # 在保存课程的时候统计课程机构的课程数
    # obj实际是一个course对象
    obj = self.new_obj
    # 对当前课程进行保存，否则统计的课程数会少一个
    obj.save()
    if obj.course_org is not None:
      course_org = obj.course_org
      course_org.course_nums = Course.objects.filter(course_org=course_org).count()
      course_org.save()   

class CourseOrgAdmin(object):
  list_display = ['name', 'desc', 'click_num','fav_nums','image','address','city','add_time']
  search_fields = ['name', 'desc', 'click_num','fav_nums','image','address','city']
  list_filter = ['name', 'desc', 'click_num','fav_nums','image','address','city','add_time']
  # 某一个model指向它时，它是以ajax加载的方式来完成的，通过搜索来进行添加某个字段，这样可以避免数据量过大时，把所有数据都加载进来
  relfield_style='fk-ajax'

class LessonInline(object):
  model = Lesson
  extra = 0

class CourseResourceInline(object):
  model = CourseResource
  extra = 0

#inlines 实现在添加course的同时，在同页面添加相应的章节与课程资源
class CourseAdmin(object):
  inlines = [LessonInline,CourseResourceInline]  #增加章节和课程资源

# register中可以看出register中还有一个参数admin_class=None:
def register(self, model_or_iterable, admin_class=None, **options):
  if not admin_class:
    admin_class = ModelAdmin

class UserAdmin(ModelAdmin):
  list_display = ('name', 'email', 'ut')
admin.site.register(UserInfo, UserAdmin)