Laravel hasOne如何保存ID

Question

我是 laravel 的新手，但我已经很喜欢它了。 现在我用 Eloquent 玩了一点，然后出现了一个问题：

我的客户有两个地址（BillingAdress 和 DeliveryAddress）

客户字段：ID、名字、姓氏、BillingAddress、DeliveryAddress 地址-字段：ID、地址、邮编、城市、国家

现在我想创建客户，在创建他之后，我想为他分配地址。

客户模型：

class Customer extends Model
{
    public function deliveryAddress() {
        return $this->hasOne("App\Address");
    }

    public function billingAddress() {
        return $this->hasOne("App\Address");
    }
}

地址模型：

 class Address extends Model
    {
        public function customer() {
            return $this->belongsTo("App\Customer");
        }
    }

控制器：

$c = new Customer;
$c->Firstname = "John";
$c->Lastname = "Doe";
$c->save();

$billingAddress = new Address;
$billingAddress->address = "Exampleroad 3";
$billingAddress->zip = 11111;
$billingAddress->city = "Examplecity";

$deliveryAddress = new Address;
$deliveryAddress->address = "Doestreed 21";
$deliveryAddress->zip = "44444";
$deliveryAddress->city = "Doedown";

$c->billingAddress()->save($billingAddress);
$c->deliveryAddress()->save($deliveryAddress);

但现在地址表中的 cusomer_id 已保存，但客户表中的 deliveryAddress 和 billingAddress 为空。

Answer 1

您应该设置外键和本地键，以便 Laravel 知道您所指的 id 字段。

class Customer extends Model
{
    public function deliveryAddress() {
        return $this->hasOne("App\Address", "id", "deliveryAddress");
    }

    public function billingAddress() {
        return $this->hasOne("App\Address", "id", "billingAddress");
    }
}

关于如何使用这些的完整文档可以在这里找到：https://laravel.com/docs/5.4/eloquent-relationships#one-to-one