How to retrieve files by object id?

[Myzel394]

Sadly the documentation doesn't cover how to actually implement your own retrieve class.

I tried many solutions, but nothing worked. It would be nice if someone could add a more detailed explanation to the readme or explain it at least here.

Here are my tries, so you don't have to waste your time by trying out none working solutions:

    path("private-media/", MaterialDownloadView.as_view(), name="serve_private_file"),
    path("private-media/", include(private_storage.urls)),

    url(r'(?P<path>.*)', MaterialDownloadView.as_view(), name="serve_private_file"),
    path("private-media/", include(private_storage.urls)),

    url(r'(.*)(?P<path>.*)', MaterialDownloadView.as_view(), name="serve_private_file"),
    path("private-media/", include(private_storage.urls)),

    path("private-media/", MaterialDownloadView.as_view()),
    path("private-media/", include(private_storage.urls)),

[digitalw]

This is what I got.
in URLS: path('file/<int:pk>/', FileView.as_view(), name='file-view'),
and the view:

   class FileView(PrivateStorageDetailView):
       model = SecuredFile
       model_file_field = 'file'
       def can_access_file(self, private_file):
           user =private_file.request.user 
           ...

the model is:

    class SecuredFile(models.Model):
        uploaded_at = models.DateTimeField(auto_now_add=True)
        file = PrivateFileField("File")

Hope that helps

[Myzel394]

Thank you @digitalw! Totally forgot I opened this issue. :D I ended up using this:

settings.py

PRIVATE_STORAGE_AUTH_FUNCTION = "path.to.private_storage_access_check"

my storage check function

storage_models = [
    Material, Submission
]


def private_storage_access_check(private_file: PrivateFile) -> bool:
    user = private_file.request.user
    
    if not user.is_authenticated:
        return False
    
    relative_path = Path(private_file.full_path).relative_to(settings.MEDIA_ROOT)
    
    for model in storage_models:
        for instance in model.objects.only("file").filter(file=relative_path):
            if instance.can_user_access_file(user):
                return True
    
    return False

and on the models I defined a can_user_access_file(user: User) -> bool method, here an example:

def can_user_access_file(self, user: "User") -> bool:
    return user == self.user

[aayardev]

Thanks a lot, it worked.
For windows users, replace '\' with '/', use this :

      relative_path = Path(private_file.full_path).relative_to(settings.MEDIA_ROOT)
      relative_path = str(relative_path).replace("\\","/")