Question

我打算从ThumbnailBackend继承sorl.thumbnail.base类。我需要做的是覆盖_get_thumbnail_filename方法，将一些东西添加到原始（父）方法生成的文件名中。为此，我写了这样的话：

from sorl.thumbnail.base import ThumbnailBackend

class MyThumbnailBackend(ThumbnailBackend):
    def _get_thumbnail_filename(self, source, geometry_string, options):
        oldpath = super(ThumbnailBackend,self)._get_thumbnail_filename(source, geometry_string, options)
        oldpathlist = oldpath.split('/')
        # get the last item of 'oldpathlist' and
        # sufix it with useful info...
        # join the items with the modified one...
        return newpath

python继承应该有一些我缺少的东西，因为我一直收到以下错误：

AttributeError at /location/of/the/caller/class/
'super' object has no attribute '_get_thumbnail_filename'

如果我是对的，我在第一行导入this class：from sorl.thumbnail.base import ThumbnailBackend肯定有_get_thumbnail_filename方法。

我做错了什么？

非常感谢！

Answer 1

您必须使用当前课程调用super，将super(ThumbnailBackend, self)更改为super(MyThumbnailBackend, self)，就像这样

class MyThumbnailBackend(ThumbnailBackend):
    def _get_thumbnail_filename(self, source, geometry_string, options):
        return super(MyThumbnailBackend, self)._get_thumbnail_filename(source, geometry_string, options)

子类化sorl-thumbnail`ThumbnailBackend`类，并覆盖_get_thumbnail_filename不起作用

1 个答案: