我有學說多對多SQLSTATE [HY000]：常規錯誤：1005年無法創建表（錯誤：150）
/**
* @package Entity
* @ORM\Entity
* @ORM\Table(name="r_country")
*/
class RCountry {
/**
* @ORM\Column(type="string", length=2)
* @ORM\Id
*/
protected $id;
...
/**
*
* @ORM\ManyToMany(targetEntity="RLanguage")
* @ORM\JoinTable(name="prohibited_language_display",
* joinColumns={@ORM\JoinColumn(name="country_id", referencedColumnName="id", onDelete="CASCADE")},
* inverseJoinColumns={@ORM\JoinColumn(name="language_id", referencedColumnName="id", onDelete="CASCADE")}
* )
*
*/
protected $prohibitedLanguageDisplay;
...
}
/**
* @package Entity
* @ORM\Entity
* @ORM\Table(name="r_language")
*/
class RLanguage
{
/**
* @ORM\Column(type="string", length=20)
* @ORM\Id
*
*/
protected $id;
...
}
我試圖做學說多對多關係，但是當一個問題，我做到這一點觸發一個錯誤
[Doctrine\DBAL\Exception\DriverException]
An exception occurred while executing 'ALTER TABLE prohibited_language_display ADD CONSTRAINT FK_77B02D13F92F3E70 FOREIGN KEY (country_id) REFERENCES r_country (id) ON DELETE CASCADE':
SQLSTATE[HY000]: General error: 1005 Can't create table 'database.#sql-498_8797' (errno: 150)[Doctrine\DBAL\Driver\PDOException]SQLSTATE[HY000]: General error: 1005 Can't create table 'database.#sql-498_8797' (errno: 150)
[PDOException]SQLSTATE[HY000]: General error: 1005 Can't create table 'database.#sql-498_8797' (errno: 150)
這是個轉儲SQL我得到
CREATE TABLE prohibited_language_google (country_id VARCHAR(2) NOT NULL, language_id VARCHAR(20) NOT NULL, INDEX IDX_77B02D13F92F3E70 (country_id), INDEX IDX_77B02D1382F1BAF4 (language_id), PRIMARY KEY(country_id, language_id)) DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE = InnoDB; ALTER TABLE prohibited_language_display ADD CONSTRAINT FK_77B02D13F92F3E70 FOREIGN KEY (country_id) REFERENCES r_country (id) ON DELETE CASCADE; ALTER TABLE prohibited_language_google ADD CONSTRAINT FK_77B02D1382F1BAF4 FOREIGN KEY (language_id) REFERENCES r_language (id) ON DELETE CASCADE;
我已經tryed去刪除數據庫和c的更新使用教條與新的教程一起使用，這樣可以，但是我想只做更新，否則我生病會丟失數據庫中的所有數據。
有沒有人可以幫助我？