Laravel 5.1 - 通过多个表

Question

加入我有以下表格：

Customer 
    id 

Order 
    id 
    customer_id 

Order_notes 
    order_id 
    note_id 

Notes 
    id 

如果我想获得的所有订单笔记客户，所以我可以做到以下几点，我该怎么办呢？有没有办法在我的模型中定义一个通过多个数据透视表加入客户来订购笔记的关系？

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

Answer 1

最后我只是做了以下内容：

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'); 
    } 
} 

然后访问像这样的注释：

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

Answer 2

怎么样'belongsToMany'？ 例如像

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

当然，它会不会直接工作，如果你想获得订单对象还（但也许你可以使用withPivot）

Answer 3

创建您的模型这些关系。

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 
{ 

} 

您可以使用此查询得到的关系：

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