DATABASE_URL is not set(CS50) [duplicate]

Answer 1

If you use Linux you could set variable in environment via:

 $ export DATABASE_URL="postgresql://localhost/yourdatabase"

Answer 2

add this code after initialising your app:

app.config['DATABASE_URL'] = "path_to_db"

Or export it by running in your command line:

export DATABASE_URL=""postgres://user:password@server_ip:5432/table_name""