如何将信息插入Order-OrderProduct表MySQL Laravel

我正在用laravel开发简单的电子商务网站用于学习目的 .

当客户下订单时，关于数据库关系和将数据插入order-order_product表的事情让我很困惑 .

用户迁移：

Schema::create('users', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('address');
            $table->string('phone');
            $table->string('email')->unique();
            $table->string('password');
            $table->rememberToken();
            $table->timestamps();
        });

用户模型：

class User extends Authenticatable
{

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'email', 'password',
    ];

    protected $attributes =[
     'street' => 'no adress entered',
     'city' => 'no city entered',
     'phone' => 'no phone'


    ];
    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];
    public function orderproduct(){        
        return $this->hasMany('App\OrderProduct');   
}
}

订单表：

Schema::create('orders', function (Blueprint $table) {
            $table->increments('id');
            $table->integer('customer_id')->unsigned();
            $table->foreign('customer_id')->references('id')->on('users');
            $table->string('name');
            $table->string('address');
            $table->string('phone');
            $table->date('order_date'); 

            $table->timestamps();
        });

订单型号：

class Order extends Model
{
   //Table Name

   protected $table = 'orders';

   //Primary Key

   public $primaryKey = 'id';

   //Timestamps

   public $timestamps =true;

public function user(){        
        return $this->belongsTo('App\User');   
}

public function orderproduct(){
    return $this->hasMany('App\OrderProduct');
}

}

产品表：

Schema::create('products', function (Blueprint $table) {
            $table->increments('id');
            $table->string('img');
            $table->string('name');
            $table->string('desc');
            $table->integer('quantity');//stokta kaç tane oldugu
            $table->integer('price');
            $table->timestamps();
        });

产品型号：

class Product extends Model
{

    //Table Name

    protected $table = 'products';

    //Primary Key

    public $primaryKey = 'id';


    //Timestamps

    public $timestamps =true;

    public function orderproduct(){        
        return $this->belongsTo('App\OrderProduct');

    }
}

order_product表：

Schema::create('order_product', function (Blueprint $table) {
            $table->increments('id');
              $table->integer('order_id')->unsigned();
            $table->integer('product_id')->unsigned();
            $table->integer('quantity')->unsigned();
            $table->timestamps();

            $table->foreign('order_id')->references('id')->on('orders');
            $table->foreign('product_id')->references('id')->on('products');
        });

订单产品型号：

class OrderProduct extends Model
{

    //Table Name

    protected $table = 'order_product';

    //Primary Key

    public $primaryKey = 'id';


    //Timestamps

    public $timestamps =true;

public function order(){         
    return $this->belongsTo('App\Order');   

}
public function product(){
    return $this->hasMany('App\Product');   

}



}

我正在使用laravel会话来保存购物车数据 . 我也有一个ordercontroller用于存储订单到数据库 . 问题是如何正确插入订单和order_product表？首先我要插入订单然后到order_product表？例如，如果用户的购物车中有多个商品，因为order_product表中的product_id列需要是原子的，我需要插入多行 . 我可以从我的购物车访问product_id及其数量，但我无法设法正确循环并插入数据库 .

public function store(Request $request)
    {
        $oldCart = Session::get('cart'); 
        $cart = new Cart($oldCart);
//dd(arrays_keys($cart->items)); // returns ids of products in cart
//dd($cart->items[1]['qty']);      // returns quantity of item which has id 1



        $order = new Order;
        $order->name = $request->input('name');
        $order->address = $request->input('address');
        $order->phone = $request->input('phone');
        $order->customer_id = auth()->user()->id;

        $order->save();

        $orderProduct = new OrderProduct;

        //$orderProduct->product_id = ??  how to write in multiple rows if user has multiple items(so values will be atomic in product_id column)
        //$orderProduct->quantity= ??



    }