如何确保文件存在于Django项目中? [英] How to ensure file exists in Django project?

问题描述

您好！

我的问题很简单，因为标题清楚地描述了它.

My question is simple as the title clearly describes it.

我在某些模型中具有FileField，我添加了一个属性方法来检查文件的存在:

I have FileField in some models , I added a property method to check the existance of file:

@property
def file_exists(self):
    # Because sometimes, the field may contain the string path
    # but the file doesn't exist at all in the server
    if file: # if the string path exists
        return os.path.exists(self.file.path) # If the file exists in server

这在开发中非常有效，但是当我在AWS上迁移所有文件时，会引发错误，表明我没有这样做的权限.

This works perfectly in development, but when I migrate all my files on AWS, it raises an Error such I don't have permission to do that.

我想知道是什么问题，还是有另一种方法来测试文件是否存在?

I wonder what's wrong or Is there another way to test whether a file exists?

提前谢谢！

推荐答案

您应使用与存储无关的

You should use the storage-agnostic Storage.exists() method.

存储对象应该在FieldFile本身上可用，所以类似

The storage object should be available on the FieldFile itself, so something like

return self.file.storage.exists(self.file.name)

应该可以解决问题.

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