php - yii迁移返回1215 mysql错误

Question

一遍又一遍地搜索和检查我的代码后，现在我想问一下。
我有 2 个表 umessage 和 ureply，当我想将外键从 ureply 引用添加到 umessage 时，我得到了1215 mysql 错误。

文件m140602_080318_create_table_umessage.php中创建umessage表的代码:

public function safeUp()
{
    /*
     * Create table umessage, this is connection way between customer & seller about specific object
     * Add foreign key to table user and it's column id with sender column
     * Add foreign key to table object and it's column id with objId column
     */
    $this->createTable('tbl_umessage', array(
        'id' => 'pk',
        'time' => 'INT(15) NOT NULL',
        'body' => 'TEXT NOT NULL',
        'status' => 'TINYINT NOT NULL DEFAULT 0',
        'visibleToS' => 'TINYINT NOT NULL DEFAULT 0',
        'visibleToR' => 'TINYINT NOT NULL DEFAULT 0',
        'sender' => 'INT(11)',
        'objId' => 'INT(11) NOT NULL',
    ), 'ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci');
}  

文件m140602_080329_create_table_ureply.php中的代码创建ureply表:

public function safeUp()
{
    /*
     * Create table ureply which store all replies to exact message
     * Add foreign key to table umessage and it's column id with msgId column
     */
    $this->createTable('tbl_ureply', array(
        'id' => 'pk',
        'time' => 'INT(15) NOT NULL',
        'body' => 'TEXT NOT NULL',
        'isSender' => 'TINYINT NOT NULL DEFAULT 0',
        'msgId' => 'INT(11) NOT NULL',
    ), 'ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci');

    $this->addForeignKey('fk_ureply_umessage', 'tbl_ureply', 'msgId', 'umessage', 'id', 'CASCADE', 'CASCADE');
} 

1215 错误是由于添加 fk_ureply_umessage 外键而导致的，我找不到我的错误。任何帮助将不胜感激。提前致谢。

Answer 1

您在 addForeignKey 方法中出现错误:

$this->addForeignKey('fk_ureply_umessage', 'tbl_ureply', 'msgId', 'umessage', 'id', 'CASCADE', 'CASCADE');

外键引用的表应该是tbl_umessage而不是umessage:

$this->addForeignKey('fk_ureply_umessage', 'tbl_ureply', 'msgId', 'tbl_umessage', 'id', 'CASCADE', 'CASCADE');