Laravel 5.1 - 通過多個表

Question

加入我有以下表格：

Customer 
    id 

Order 
    id 
    customer_id 

Order_notes 
    order_id 
    note_id 

Notes 
    id 

如果我想獲得的所有訂單筆記客戶，所以我可以做到以下幾點，我該怎麼辦呢？有沒有辦法在我的模型中定義一個通過多個數據透視表加入客戶來訂購筆記的關係？

@if($customer->order_notes->count() > 0) 
    @foreach($customer->order_notes as $note) 
     // output note 
    @endforeach 
@endif 

Answer 1

最後我只是做了以下內容：

class Customer extends Model 
{ 
    public function order_notes() 
    { 
     return $this->hasManyThrough('App\Order_note', 'App\Order'); 
    } 
} 

class Order_note extends Model 
{ 
    public function order() 
    { 
     return $this->belongsTo('App\Order'); 
    } 

    public function note() 
    { 
     return $this->belongsTo('App\Note')->orderBy('notes.id','desc'); 
    } 
} 

然後訪問像這樣的註釋：

@foreach($customer->order_notes as $note) 
    echo $note->note->text; 
@endforeach 

Answer 2

怎麼樣'belongsToMany'？ 例如像

$customer->belongsToMany('OrderNote', 'orders', 'customer_id', 'id'); 

當然，它會不會直接工作，如果你想獲得訂單對象還（但也許你可以使用withPivot）

Answer 3

創建您的模型這些關係。

class Customer extends Model 
{ 
    public function orders() 
    { 
     return $this->hasMany(Order::class); 
    } 

    public function order_notes() 
    { 
     // have not tried this yet 
     // but I believe this is what you wanted 
     return $this->hasManyThrough(Note::class, Order::class, 'customer_id', 'id'); 
    } 
} 

class Order extends Model 
{ 
    public function notes() 
    { 
     return $this->belongsToMany(Note::class, 'order_notes', 'order_id', 'note_id'); 
    } 
} 

class Note extends Model 
{ 

} 

您可以使用此查詢得到的關係：

$customer = Customer::with('orders.notes')->find(1);