Question

我的迁移是

Schema::create('user_details', function (Blueprint $table) {
    $table->Increments('id')->unique();
    $table->text('detail');
    $table->text('value');
    $table->integer('user_id');
    $table->timestamps();

    $table->foreign('user_id')->references('id')->on('users');
});

和

Schema::create('users', function (Blueprint $table) {
    $table->Increments('id')->unique();
    $table->integer('user_detail_id');
    $table->integer('user_setting_id');
    $table->integer('company_id');
    $table->mediumText('role');
    $table->mediumText('email')->unique();
    $table->mediumText('password');
    $table->timestamps();
});

当我尝试迁移时，出现以下错误消息：

errno：150“外键约束格式不正确”（SQL：alter 表user_details添加约束user_details_user_id_foreign 外键（user_id）引用users（id））

为什么会这样？

Answer 1

您需要为表设置InnoDB存储引擎。您可以在模式生成器中进行操作：$table->engine = 'InnoDB';或在config/database.php文件（connections => mysql => engine）中：将'engine' => null,更改为'engine' => 'InnoDB',。

第二个定义为$table->increments('id');的主键会自动递增 UNSIGNED INTEGER 。并且您的外键应为无符号整数。进一步了解creating columns。

Schema::create('user_details', function (Blueprint $table) {
    $table->engine = 'InnoDB';

    $table->increments('id');
    $table->text('detail');
    $table->text('value');
    $table->unsignedInteger('user_id');
    $table->timestamps();

    $table->foreign('user_id')->references('id')->on('users');
});

Schema::create('users', function (Blueprint $table) {
    $table->engine = 'InnoDB';

    $table->increments('id');
    $table->integer('user_detail_id');
    $table->integer('user_setting_id');
    $table->integer('company_id');
    $table->mediumText('role');
    $table->mediumText('email')->unique();
    $table->mediumText('password');
    $table->timestamps();
});

外键约束在MySQL中的格式不正确：Laravel迁移

1 个答案: