外键

Question

当我尝试在两个表之间设置关系时，我收到错误：

  

    

D：\ wamp \ www＆gt; php artisan migrate迁移表已成功创建。

  

     

[Illuminate \ Database \ QueryException] SQLSTATE [HY000]：常规   错误：1215无法添加外键约束（SQL：alter table   rittenregistratie添加co nstraint   rittenregistratie_karakterritid_foreign外键（karakterritid）   关于d elete cascade的参考karakterrit（id）

     

[PDOException] SQLSTATE [HY000]：常规错误：1215无法添加   外键约束

     

d：\瓦帕\ WWW＆GT;

这是我的移民rittenregistratie（它的荷兰语）：

    <?php

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

class CreateRittenregistratieTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('rittenregistratie', function (Blueprint $table) 
        {
            $table->increments('id');
            $table->integer('user_id')->unsigned();
            $table->timestamps('datum');
            $table->integer('beginstand');
            $table->integer('eindstand');
            $table->text('van');
            $table->text('naar');
            $table->text('bezoekadres');
            $table->text('geredenroute');
            $table->integer('karakterritid')->default(1);
            $table->text('toelichting');
            $table->integer('kilometerszakelijk');
            $table->integer('kilomteresprive');

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

            $table->foreign('karakterritid')
                        ->references('id')
                        ->on('karakterrit')
                        ->onDelete('cascade');
        });
    }

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

这是我想要涉及的地方：

<?php

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

class CreateKarakterritTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('karakterrit',function(Blueprint $table)
        {
            $table->increments('id');
            $table->text('rit');          
        });
    }

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

我做错了什么？