def user_directory_path(instance,filename):

    print instance,filename

    ext = filename.split('.')[-1]

    print 'ext',ext

    filename = '{}.{}'.format(uuid.uuid4().hex[:10], ext)

    print filename

    # print os.path.join(instance.user.id, "avatar", filename)

    return os.path.join("uepload", filename)

class Course(models.Model):

    detail = UEditorField(verbose_name="课程详情",width=600, height=300, imagePath="courses/",filePath="courses/", default='')

    is_banner = models.BooleanField(default=False, verbose_name="是否轮播")

    degree = models.CharField(verbose_name="难度", choices=(("cj","初级"), ("zj","中级"), ("gj","高级")), max_length=2)

    fav_nums = models.IntegerField(default=0, verbose_name='收藏人数')

    image = models.ImageField(upload_to=user_directory_path, verbose_name="封面图", max_length=100)

    click_nums = models.IntegerField(default=0, verbose_name="点击数")

　　class Meta:
    　　verbose_name = "课程"
    　　erbose_name_plural = verbose_name