这是我桌子的结构:
CREATE TABLE `company_info` (
`id` int(11) NOT NULL,
`name` varchar(255) COLLATE utf8_polish_ci DEFAULT NULL,
`description` longtext COLLATE utf8_polish_ci,
`updated` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`created_info` date DEFAULT NULL,
`company_id` int(11) DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `Index_1` (`id`),
KEY `FK_Reference_4` (`company_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_polish_ci
我需要在Yii 1.x中使用CDbMigration来更改它。目前,密钥FK_Reference_4
(company_id
)是表id
中company
的外键。我想:
users
)。当我尝试使用yiic migration
执行迁移时,命令失败:
$this->dropForeignKey('FK_Reference_4','company_info');
有以下错误:
Exception: CDbCommand failed to execute the SQL
statement: SQLSTATE[HY000]: General error: 1025 Error on rename of '.\focuserv\
company_info' to '.\focuserv\#sql2-1b0-18' (errno: 152). The SQL statement execu
ted was: ALTER TABLE `company_info` DROP FOREIGN KEY `FK_Reference_4` (E:\IDEs\w
amp\www\focuserv\focuserv\framework\db\CDbCommand.php:358)
所以dropForeignKey
失败了。我该如何解决或解决这个问题?
答案 0 :(得分:2)
基于上面的create table sql语句,它看起来不像你的FK_Reference_4
是外键,它看起来像普通索引。尝试更改
$this->dropForeignKey('FK_Reference_4','company_info');
到
$this->dropIndex('FK_Reference_4','company_info');
FYI外键sql语句如下所示:
ALTER TABLE `company_info`
ADD CONSTRAINT `FK_Reference_4` FOREIGN KEY (`company_id`)
REFERENCES `company` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION;