main thread closes after running terminal command from controller

Question

def create
    # exec('python')
    Thread.new do
        puts"exec"
        exec('python3.7 -c "print(\"Ran a new command in thread\")"')
    end

    render json: {"message": "Successfully added image", "status": "200"}, status: :ok
end

after this code runs the server closes

Can anyone help me understand what is the problem?

Answer 1

I figured it out. I should use system instead of exec to run my command.

system runs the command in a subshell.\\

so now the code becomes

system 'python3.7 -c "print(\"Ran a new command in thread\")"'