Question

在这个简单的两个表中我想在user_amounts_account.id和CREATE TABLE IF NOT EXISTS `report_transactions` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `amount` int(11) NOT NULL, `order_id` varchar(20) COLLATE utf8_unicode_ci NOT NULL, `payment_order_id` varchar(20) COLLATE utf8_unicode_ci NOT NULL, `token` varchar(255) COLLATE utf8_unicode_ci NOT NULL, `reference_id` varchar(255) COLLATE utf8_unicode_ci NOT NULL, `given_reference_id` varchar(25) COLLATE utf8_unicode_ci NOT NULL, `description` text COLLATE utf8_unicode_ci NOT NULL, `redirect_url` varchar(255) COLLATE utf8_unicode_ci NOT NULL, `type_result` varchar(50) COLLATE utf8_unicode_ci NOT NULL, `result` tinyint(4) NOT NULL, `customer_id` int(10) unsigned NOT NULL, `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `updated_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00', PRIMARY KEY (`id`), KEY `report_transactions_customer_id_foreign` (`customer_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=232 ; CREATE TABLE IF NOT EXISTS `amount_repositories` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `user_id` int(10) unsigned NOT NULL, `amount` varchar(255) COLLATE utf8_unicode_ci NOT NULL, `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `updated_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00', PRIMARY KEY (`id`), KEY `amount_repositories_user_id_foreign` (`user_id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=1 ; CREATE TABLE IF NOT EXISTS `user_amounts_account` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `user_id` int(10) unsigned NOT NULL, `amount` varchar(255) COLLATE utf8_unicode_ci NOT NULL, `type` tinyint(4) NOT NULL, `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `updated_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00', PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=1 ; ALTER TABLE `amount_repositories` ADD CONSTRAINT `amount_repositories_user_id_foreign` FOREIGN KEY (`user_id`) REFERENCES `report_transactions` (`customer_id`); ALTER TABLE `user_amounts_account` ADD CONSTRAINT `user_amounts_account_user_id_foreign` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`); ALTER TABLE `amount_repositories` ADD CONSTRAINT `amount_repositories_user_id_foreign` FOREIGN KEY (`user_id`) REFERENCES `user_amounts_account` (`id`);之间创建外键，但是我收到错误：

Mysql创建表：

#1005 - Can't create table 'test.#sql-4c2_403' (errno: 150) (Details…)

错误：

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Answer 1

一般来说，代码是这样的，

Schema::create('gigs', function($table)
{
    $table->increments('gig_id');

    $table->dateTime('gig_startdate');

    $table->integer('band_id')->unsigned();
    $table->integer('stage_id')->unsigned();
});

Schema::table('gigs', function($table)
{
    $table->foreign('band_id')
        ->references('band_id')->on('bands')
        ->onDelete('cascade');

    $table->foreign('stage_id')
        ->references('stage_id')->on('stages')
        ->onDelete('cascade');
});

Answer 2

创建PHP类文件 create_user_amounts_account_table.php 并放置以下代码

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class UserAmountsAccount extends Migration
{

   /**
   * Run the migrations.
   *
   * @return void
   */
   public function up()
   {
    Schema::create('UserAmountsAccount', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id');
        $table->string('amount');
        $table->boolean('type');
        $table->timestamps();
    });
}

   /**
   * Reverse the migrations.
   *
   * @return void
   */
  public function down()
  {
    Schema::drop('UserAmountsAccount');
  }

}

创建PHP类文件 create_amount_repositories_table.php 并放置以下代码

use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class AmountRepositories extends Migration
{

   /**
   * Run the migrations.
   *
   * @return void
   */
   public function up()
   {
    Schema::create('AmountRepositories', function (Blueprint $table) {
        $table->increments('id');
        $table->integer('user_id');
        $table->string('amount');
        $table->timestamps();
        $table->integer('user_id')->unsigned();
        $table->foreign('user_id')
            ->references('id')
            ->on('user_amounts_account')->onDelete('cascade');
    });
}

   /**
   * Reverse the migrations.
   *
   * @return void
   */
  public function down()
  {
    Schema::drop('AmountRepositories');
  }

}

最后运行迁移。那就是它！

MySql在两个表之间创建简单的外键

2 个答案: