Cannot add foreign key constraint (1215) (2 replies)

Hi,
I'm trying to create a foreign key constraint on a new table, but I keep seeing an error. I don't see what the problem is. Can anybody help me out? At least, how do I get more information to debug this?

If this is the wrong forum, can somebody please point me to the right one? Also, I don't see how to add tags (like <pre> or

), so sorry for the formatting. I can edit the post if somebody tells me how to mark it up correctly.

Thanks,
Eric Stein

CREATE TABLE `auth_user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(30) NOT NULL,
  `first_name` varchar(30) NOT NULL,
  `last_name` varchar(30) NOT NULL,
  `email` varchar(75) NOT NULL,
  `password` varchar(128) NOT NULL,
  `is_staff` tinyint(1) NOT NULL,
  `is_active` tinyint(1) NOT NULL,
  `is_superuser` tinyint(1) NOT NULL,
  `last_login` datetime NOT NULL,
  `date_joined` datetime NOT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `username` (`username`)
) ENGINE=MyISAM AUTO_INCREMENT=33 DEFAULT CHARSET=utf8$$			

CREATE TABLE `tastypie_apikey` (
    `id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,
    `user_id` integer NOT NULL UNIQUE,
    `key` varchar(255) NOT NULL,
    `created` datetime NOT NULL
);

0 row(s) affected Records: 0  Duplicates: 0  Warnings: 0

ALTER TABLE `tastypie_apikey` 
ADD CONSTRAINT `user_id_refs_id_56bfdb62` 
FOREIGN KEY (`user_id`) 
REFERENCES `auth_user` (`id`);

Error Code: 1215. Cannot add foreign key constraint