How to set DATABASE_URL environment variable for Postgres Mac terminal?

问题

I am using postgres on Mac. I have a database up and running. I want to use it with Flask (SQL Alchemy) but the DATABASE_URL environment variable didn't create itself (I think it's supposed to do that). Here is the code I tried running:

import os
print(os.getenv("DATABASE_URL"))

And there's no output. How can I set the variable (if I need to set it up manually).

回答1:

Yes, you have to do that manually. So, within your terminal do this:

% cd
% nano .bash_profile

It will open a file 'bash_profile' in editor in your terminal. And in there you can set environmental variables like:

export DATABASE_URL="YOUR DATABASE URL"

Check this video out for more info: https://youtu.be/5iWhQWVXosU

来源：https://stackoverflow.com/questions/61901732/how-to-set-database-url-environment-variable-for-postgres-mac-terminal