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Asked: 2026-06-07T12:18:52+00:00

I’m developing a web-based application with PHP/MySQL + Yii Framework. The problem occurs as

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I’m developing a web-based application with PHP/MySQL + Yii Framework. The problem occurs as a constraint check error in a transaction.

I have the following tables:

User

CREATE TABLE IF NOT EXISTS `User` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(64) DEFAULT NULL,
  `surname` varchar(64) DEFAULT NULL,
  `email` varchar(128) DEFAULT NULL,
  `password` varchar(255) DEFAULT NULL,
  `creation_date` datetime DEFAULT NULL,
  `last_login_date` datetime DEFAULT NULL,
  `status` tinyint(1) DEFAULT '0',
  `level` tinyint(1) DEFAULT '0',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=40 ;

CandidateInfo

CREATE TABLE IF NOT EXISTS `CandidateInfo` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_id` int(11) DEFAULT NULL,
  `candidate_status_id` int(11) DEFAULT NULL,
  `name` varchar(64) DEFAULT NULL,
  `surname` varchar(64) DEFAULT NULL,
  `email` varchar(128) DEFAULT NULL,
  `gender` tinyint(1) DEFAULT '0',
  `date_of_birth` datetime DEFAULT NULL,
  `home_phone` varchar(20) DEFAULT NULL,
  `mobile_phone` varchar(20) DEFAULT NULL,
  `creation_date` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
  `rating` tinyint(1) DEFAULT '0',
  `location` varchar(100)DEFAULT NULL,
  PRIMARY KEY (`id`),
  KEY `FK_candidateinfo_user` (`id`),
  KEY `FK_candidateinfo_candidatestatus` (`candidate_status_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=26 ;

Basically I’m trying to add a new row to User table, and then use the insert id to add a new row to the CandidateInfo table (user_id column)

The php code is as 

$transaction = Yii::app()->db->beginTransaction();
try {
    $user->save();
    $candidate->setAttribute('user_id', $user->id);
    $candidate->save();
    $transaction->commit();
} catch (Exception $e) {
    $transaction->rollBack();
    var_dump($e->getMessage());
}

The error is:

 SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`origo`.`CandidateInfo`, CONSTRAINT `FK_candidateinfo_user` FOREIGN KEY (`id`) REFERENCES `User` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION). The SQL statement executed was: INSERT INTO `CandidateInfo` (`gender`, `rating`, `name`, `surname`, `email`, `date_of_birth`, `home_phone`, `mobile_phone`, `user_id`) VALUES (:yp0, :yp1, :yp2, :yp3, :yp4, :yp5, :yp6, :yp7, :yp8)

When i check the mysql query logs, i see that it takes the right user_id for the INSERT statement for CandidateInfo table. But fails with the above error. From my understanding, it is supposed to work, but may be i am mistaken and this is not the way transactions are meant to work.

Both tables are InnoDB.

Thanks in advance.

Edit:
Sorry forgot to paste the FK relations.

ALTER TABLE `CandidateInfo`
  ADD CONSTRAINT `FK_candidateinfo_candidatestatus` FOREIGN KEY (`candidate_status_id`) REFERENCES `CandidateStatus` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
  ADD CONSTRAINT `FK_candidateinfo_user` FOREIGN KEY (`id`) REFERENCES `User` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION;
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1 Answer

  1. Editorial Team
    ALTER TABLE `CandidateInfo`
  ADD CONSTRAINT `FK_candidateinfo_candidatestatus` FOREIGN KEY (`candidate_status_id`) REFERENCES `CandidateStatus` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
  ADD CONSTRAINT `FK_candidateinfo_user` FOREIGN KEY (`id`) REFERENCES `User` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION;

    should be

    ALTER TABLE `CandidateInfo`
  ADD CONSTRAINT `FK_candidateinfo_candidatestatus` FOREIGN KEY (`candidate_status_id`) REFERENCES `CandidateStatus` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
  ADD CONSTRAINT `FK_candidateinfo_user` FOREIGN KEY (`user_id`) REFERENCES `User` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION;

    you’ve got id references id in yours.

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