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

I know this answer is way late, and I realize this is the same as btubbs one-liner, just a little more descriptive ...

Assuming you want to reference the primary key in table auth_user and that key name is 'id'.

I use this syntax:

ALTER TABLE links_chatpicmessage 
ADD COLUMN sender some_type,
ADD FOREIGN KEY (sender) REFERENCES auth_user(id);

Note: some_type = [type the same as sender in table auth_user]