models.py 文件源码

def save(self, *args, **kwargs):
        pil_image_obj = Image.open(self.thumbnail_image)
        new_image = resizeimage.resize_cover(
            pil_image_obj,
            [250, 150],
            validate=False
        )

        new_image_io = BytesIO()
        new_image.save(new_image_io, format='PNG')

        temp_name = self.thumbnail_image.name
        self.thumbnail_image.delete(save=False)

        self.thumbnail_image.save(
            temp_name,
            content=ContentFile(new_image_io.getvalue()),
            save=False
        )

        super(ThumbnailImage, self).save(*args, **kwargs)