Laravel：belongsTo() 关系假设一对多关系而不是一对一
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Laravel: belongsTo() relation assume one-to-many relationship instead of one-to-one
提问by Ingro
I'm having a tedious problem with Laravel's ORM.
我在 Laravel 的 ORM 上遇到了一个乏味的问题。
I have a model with multiple relationships, like this:
我有一个具有多种关系的模型，如下所示：
class Pages extends Eloquent {
protected $guarded = array('id','config_id');
public function template()
{
return $this->belongsTo('Templates', 'templates_id');
}
public function updateUser()
{
return $this->belongsTo('Users', 'updated_by');
}
Now I can access the template related item in a simple way, like this:
现在我可以通过一种简单的方式访问模板相关的项目，如下所示：
$this->template->name;
And it works out of the bat, because Laravel's ORM assumes it is a one-to-one relationship and internally calls the first() method.
它立即生效，因为 Laravel 的 ORM 假定它是一对一的关系并在内部调用 first() 方法。
But when I try the same with updateUser it fails, returning an error, saying that it can't call name on a non-object.
但是当我对 updateUser 尝试同样的操作时它失败了，返回一个错误，说它不能在非对象上调用 name。
But if I try this:
但如果我试试这个：
$this->updateUser()->first()->name;
it works, but it doesn't feel right to me.
它有效，但对我来说感觉不对。
So my question is, how Laravel's ORM decide if a relationship defined with belongsTo() is one-to-one or one-to-many? Is there a way to force a needed behaviour?
所以我的问题是，Laravel 的 ORM 如何决定使用belongsTo() 定义的关系是一对一还是一对多？有没有办法强制需要的行为？
Thanks
谢谢
采纳答案by Laurence
You need to define the relationship. You can define 'different' relationships on the perspective.
您需要定义关系。您可以在视角上定义“不同”的关系。
The ->belongsTo()function is an inverse function - but you havent defined anything on the users table - so it is wrongly assuming the inverse is one-to-many.
该->belongsTo()函数是一个反函数——但你没有在用户表上定义任何东西——所以它错误地假设反函数是一对多的。
Just add this to your users class:
只需将此添加到您的用户类：
class Users extends Eloquent {
public function pages()
{
return $this->hasMany('Pages');
}
}
