早上好, 我有難同當I,M試圖在我的數據庫與這個PDO插入事件此SQL錯誤的一個大問題: PHP的約束衝突錯誤1452
SQL:
$subsquery1 = "SELECT cat_id FROM categories WHERE cat_name = ".$event_cat;
$subsquery2 = "SELECT tournament_id FROM tournaments WHERE tournament_name = ".$event_tournament;
$sqlx = "INSERT INTO events(event_team1, event_team2, event_cat, event_tournament, event_start_at, event_end_to, event_by) VALUES(:event_team1, :event_team2, :event_cat, :event_tournament, :event_start_at, :event_end_to, :event_by)";
// Prepare statement
$statementx = $pdo->prepare($sqlx);
// execute the query
$resultx = $statementx->execute(array(':event_team1' => $event_team1, ':event_team2' => $event_team2, ':event_cat'=> $subsquery1, ':event_tournament'=> $subsquery2, ':event_start_at' => $event_start_at, ':event_end_to' => $event_end_to,':event_by'=>$event_by));
SQL錯誤,請:
完整性約束違規:1452不能添加或更新一個孩子 行:外鍵約束失敗(
datenbank
events
,約束events_ibfk_1
外鍵(event_cat
)參考文獻categories
(cat_id
)ON DELETE CASCADE ON UPDATE CASCADE)
-- Table structure for table `events`
CREATE TABLE `events` (
`event_id` int(8) NOT NULL AUTO_INCREMENT PRIMARY KEY,
`event_team1` varchar(255) NOT NULL,
`event_team2` varchar(255) NOT NULL,
`event_start_at` timestamp NOT NULL,
`event_end_to` timestamp NOT NULL,
`event_cat` int(8) NOT NULL,
`event_by` int(8) NOT NULL,
`event_tournament` int(8) NOT NULL,
KEY `event_cat` (`event_cat`),
KEY `event_by` (`event_by`),
KEY `event_tournament` (`event_tournament`)
)ENGINE=InnoDB DEFAULT CHARSET=latin1;
- 對錶的約束posts
- 約束的表events
ALTER TABLE `events` ADD CONSTRAINT `events_ibfk_1` FOREIGN KEY (`event_cat`) REFERENCES `categories` (`cat_id`) ON DELETE CASCADE ON UPDATE CASCADE,
ADD CONSTRAINT `events_ibfk_2` FOREIGN KEY (`event_by`) REFERENCES `users` (`id`) ON UPDATE CASCADE,
ADD CONSTRAINT `events_ibfk_3` FOREIGN KEY (`event_tournament`) REFERENCES `tournaments` (`tournament_id`) ON DELETE CASCADE ON UPDATE CASCADE;
請有人能有助於...
解決方案是在我的情況下,從pdo多事務更改爲MySQL多事務。 –