ImageField上传位置的文件名可以是什么？ [英] What can be the filename of uploading location for ImageField?

问题描述

每当我使用 cloth_image 创建服装模型时，图像就会上传到 upload_location 。

Whenever I create Cloth Model with cloth_image, the image uploads to upload_location.

我的问题是 instance.id 返回 None ，因为该实例尚未创建。 什么是ImageField的最佳上载位置？

My problem is instance.id returns None because the instance is not yet created. What can be the best upload_location for ImageField?

def upload_location(instance, filename):
    new_id = instance.id
    ext = filename.split('.')[-1]
    return "clothes/%s/%s.%s" % (instance.user.id, new_id, ext) #  <- Right Here!

class Cloth(models.Model):
    cloth_image = models.ImageField(upload_to=upload_location,
                                null=True,
                                blank=True)

我正在使用AWS S3。

I'm using AWS S3.

推荐答案

如果您想要唯一的文件名，我认为您可以使用 uuid 为此，例如

if you want unique filename, i think you can use uuid for it, for example

import uuid
import os

def get_file_path(instance, filename):
    base_dir = 'clothes'
    user.id = str(instance.user.id)
    ext = filename.split('.')[-1]
    filename = "%s.%s" % (uuid.uuid4(), ext)
    return os.path.join(base_dir, user_id, filename)

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