Laravel 5 Laravel 5.1中的多层次关系

我有三个表，我想在它们之间建立多个关系 订单、订单详情、书籍

我想在它们之间建立一个公共关系，然后在单个数组中获取值

Order.php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Order extends Model
{
    public $timestamps = false;
    protected $table='orders';

    public function orderDetails(){
        return $this->hasMany('App\OrderDetail','order_id');
    }
}

namespace App;

use Illuminate\Database\Eloquent\Model;

class OrderDetail extends Model
{
    //
    public $timestamps = false;
    protected $table='order_details';

    public function orders(){
        return $this->belongsToMany('App\Order');
    }

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

}

public function orderDetail(){
        return $this->hasManyThrough('App\OrderDetail','App\Book','id','item');
    }

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Order,App\OrderDetail,App\Book,App\User;
use Auth;
use App\Http\Requests;
use Response;
use App\Http\Controllers\Controller;

class OrderController extends Controller
{
    public function userOrders(){OrderDetail::find($orderId)->where('order_id',$orderId)->where('item','book.id')->get(); }

OrderDetail.php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Order extends Model
{
    public $timestamps = false;
    protected $table='orders';

    public function orderDetails(){
        return $this->hasMany('App\OrderDetail','order_id');
    }
}

namespace App;

use Illuminate\Database\Eloquent\Model;

class OrderDetail extends Model
{
    //
    public $timestamps = false;
    protected $table='order_details';

    public function orders(){
        return $this->belongsToMany('App\Order');
    }

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

}

public function orderDetail(){
        return $this->hasManyThrough('App\OrderDetail','App\Book','id','item');
    }

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Order,App\OrderDetail,App\Book,App\User;
use Auth;
use App\Http\Requests;
use Response;
use App\Http\Controllers\Controller;

class OrderController extends Controller
{
    public function userOrders(){OrderDetail::find($orderId)->where('order_id',$orderId)->where('item','book.id')->get(); }

和Book.php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Order extends Model
{
    public $timestamps = false;
    protected $table='orders';

    public function orderDetails(){
        return $this->hasMany('App\OrderDetail','order_id');
    }
}

namespace App;

use Illuminate\Database\Eloquent\Model;

class OrderDetail extends Model
{
    //
    public $timestamps = false;
    protected $table='order_details';

    public function orders(){
        return $this->belongsToMany('App\Order');
    }

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

}

public function orderDetail(){
        return $this->hasManyThrough('App\OrderDetail','App\Book','id','item');
    }

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Order,App\OrderDetail,App\Book,App\User;
use Auth;
use App\Http\Requests;
use Response;
use App\Http\Controllers\Controller;

class OrderController extends Controller
{
    public function userOrders(){OrderDetail::find($orderId)->where('order_id',$orderId)->where('item','book.id')->get(); }

其中项是book表中的外键和主键

在OrderController.php中

namespace App;

use Illuminate\Database\Eloquent\Model;

class Order extends Model
{
    public $timestamps = false;
    protected $table='orders';

    public function orderDetails(){
        return $this->hasMany('App\OrderDetail','order_id');
    }
}

namespace App;

use Illuminate\Database\Eloquent\Model;

class OrderDetail extends Model
{
    //
    public $timestamps = false;
    protected $table='order_details';

    public function orders(){
        return $this->belongsToMany('App\Order');
    }

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

}

public function orderDetail(){
        return $this->hasManyThrough('App\OrderDetail','App\Book','id','item');
    }

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Order,App\OrderDetail,App\Book,App\User;
use Auth;
use App\Http\Requests;
use Response;
use App\Http\Controllers\Controller;

class OrderController extends Controller
{
    public function userOrders(){OrderDetail::find($orderId)->where('order_id',$orderId)->where('item','book.id')->get(); }

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