Store generated file inside created path

In general you do not want to write to priv! You should consider it as a read only artifact store.

If you need to write to a persistent location, you should manage it aside to your application, and backup it seperately.

In general the priv folder is part of your release, if you really change its content, you invalidate the integrity of your release.

Files are stored in a separete section of your filesystem or in an S3 bucket or whatever file storage backend you use, and as such has to be considered state of your application similar to your PostgreSQL database.

I have /priv/uploads inside my app but it is empty after that I do the File.write/3
I don’t understand why, I receive :ok but when I open the folders it is empty,

Are you sure parent folders of that path exist?

i’ve tried this but this return
{[:error, :enoent]}

This always return

[{:error, :enoent}]

This can be done simpler:
Application.app_dir(:your_app_name, Path.join("priv/uploads", photo))

"/priv/uploads/#{photo}" is an absolute path and doesn’t exist on your hard drive.

Look at this thread: Accessing the priv folder from Mix release - #2 by NobbZ

What you need is something like this:

"#{List.to_string(:code.priv_dir(:your_app_name))}/uploads/#{photo}"

or use a relative path.

The program doesn’t found the path
I want to change

File.write(“/tmp/#{photo}”, photo, [:binary])

to something like this :

File.write(“/priv/uploads/#{photo}”, photo, [:binary])

but the path is not found , this return :

[{:error, :enoent}]

What is the problem?