Adding a column as a foreign key gives ERROR column referenced in foreign key constraint does not exist

Question

I have the following set up,

CREATE TABLE auth_user ( id int PRIMARY KEY );
CREATE TABLE links_chatpicmessage ();

I\'m trying to add a

Answer 1

You can do this in Postgres on one line:

ALTER TABLE links_chatpicmessage ADD COLUMN sender INTEGER REFERENCES auth_user (id);

You don't need to manually set a name. Postgres will automatically name this constraint "links_chatpicmessage_auth_user_id_fkey".