таблица и внешний ключ не работают на laravel 6 - MySql

Question

Мне нужна ваша помощь по проблеме с внешним ключом.

У меня есть три таблицы users - role_user - роль с внешним ключом для role_user и таблица ограничений внешнего ключа для role_user Но ничего не работает. Я вставляю в таблицу 'users', но ничего в таблице 'role_user' и таблице 'role'

• 'role_user', берут 'user_id' и 'role_id'
• 'role' стол взять «роль»

Большое спасибо за вашу помощь

см. мой код:

<?php

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

class CreateUsersTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('users', function (Blueprint $table) {
            //$table->engine = 'InnoDB';
            $table->bigIncrements('id');
            $table->string('name');
            $table->string('email')->unique();
            $table->timestamp('email_verified_at')->nullable();
            $table->string('role');
            //$table->foreign('role')->references('id')->on('roles');
            $table->string('password');
            $table->rememberToken();
            $table->timestamps();
        });
    }

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

<?php

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

class CreateRolesTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('roles', function (Blueprint $table) {
            //$table->engine = 'InnoDB';
            $table->bigIncrements('id');
            $table->string('role');
            //$table->foreign('role')->references('id')->on('users');
            $table->timestamps();
        });
    }

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

<?php

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

class CreateRoleUserTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('role_user', function (Blueprint $table) {
            //$table->engine = 'InnoDB';
            $table->bigIncrements('id');
            $table->bigInteger('role_id')->unsigned();
            $table->bigInteger('user_id')->unsigned();


            //$table->foreign('role_id')->references('id')->on('roles');
            //$table->foreign('user_id')->references('id')->on('users');

            $table->timestamps();
        });
    }

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

<?php

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

class CreateForeignKeysForRoleUserTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::table('role_user', function (Blueprint $table) {
            //$table->engine = 'InnoDB';
            $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
            $table->foreign('role_id')->references('id')->on('roles')->onDelete('cascade');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::table('role_user', function(Blueprint $table){
            $table->dropForeign('role_user_user_id_foreign');
            $table->dropForeign('role_user_role_id_foreign');
        });
    }
}

Модель пользователя

public function roles(){

        return $this->belongsToMany('App\Role');
    }

     /*
    public function role(){

        return $this->belongsToMany(\App\RoleUser::class);
    }
    */



    public function hasAnyRoles($roles){

        if($this->role()->whereIn('role', $roles)->first()){
              return true;
        }
        return false;
    }

    public function hasRole($role){

        if($this->roles()->where('role', $role)->first()){
              return true;
        }
        return false;
    }

Ролевая модель:

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Role extends Model
{
    protected $guarded=[];


    public function users(){

        return $this->belongsToMany('App\User:');
    }


    /*

    public function admins(){

        return $this->belongsToMany(\App\RoleUser::class);
    }
    */



}