如何使用Eloquent ORM訪問第二個表關系？

Question

所以我有3個模型：

// Customer

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

// Invoice

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

// Payment

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

在我的控制器中，我想訪問客戶的所有發票。

Customer::findOrFail($customer_id)->invoices;

上面的代碼運行良好，但我還想附加客戶每張發票的所有付款。

我嘗試做Customer::findOrFail($customer_id)->invoices->payments; 但看起來客戶模型也在尋找付款方式。

我在這里想念什么嗎？

Answer 1

$customer = Customer::with(array('invoices','invoices.payments'))->where('customer_id',$customer_id)->get();

Answer 2

采用：

$customer = Customer::with('invoices.payments')->findOrFail($customer_id);

Answer 3

$customer = Customer::find($id)->with('invoices.payments')->get();

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