Laravel Eloquent 多态一对一？
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Laravel Eloquent polymorphic one-to-one?
提问by BenjaminRH
I'm trying to setup a polymorphic one-to-one relationship (the polymorphic equivalent of has_one and belongs_to).I've got an Addressmodel, and there are several other models that I want to have one address. However, I'm confused by the wording of the docs. I've seen the morphManymethod, but my question is: should I use morphManyeven though I only want it to have one address, or is there something like a morphOnemethod I should be using?
我正在尝试建立一个多态的一对一关系（has_one 和belongs_to 的多态等价物）。我有一个Address模型，还有其他几个模型我想要一个地址。但是，我对文档的措辞感到困惑。我已经看到了该morphMany方法，但我的问题是：morphMany即使我只希望它有一个地址，morphOne我应该使用它，还是应该使用类似的方法？
EDIT: My Addressmodel has these fields, just to help visualize:
编辑：我的Address模型有这些字段，只是为了帮助可视化：
Schema::create('addresses', function ($table)
{
$table->increments('id');
$table->string('street');
$table->string('street_more')->nullable();
$table->string('city');
$table->string('state')->nullable();
$table->string('country');
$table->string('postal_code');
$table->integer('addressable_id');
$table->string('addressable_type');
});
回答by marcanuy
Yes, there is a morphOnemethod and I think is the one you should use in this case: https://github.com/laravel/framework/blob/5.2/src/Illuminate/Database/Eloquent/Model.php#L811.
是的，有一种morphOne方法，我认为在这种情况下您应该使用该方法：https: //github.com/laravel/framework/blob/5.2/src/Illuminate/Database/Eloquent/Model.php#L811。
Also you can use
你也可以使用
$table->morphs('addressable');
instead of
代替
$table->integer('addressable_id');
$table->string('addressable_type');
I've used morphOne in a custom package for L4 and works pretty well.
我在 L4 的自定义包中使用了 morphOne，并且效果很好。
回答by Andrew
Try this one, I think this is better than morphOne that not supported.
试试这个，我认为这比不支持的 morphOne 更好。
public function address()
{
return $this->hasOne('App\Address', 'addressable_id','id')
->where('addressable_type', 'App\Model');
}
