不能让Laravel的助理工作 [英] Can't get Laravel associate to work

问题描述

如果我了解关联方法，我不太确定在拉里维尔。我理解这个想法，但我似乎无法让它工作。

I'm not quite sure if I understand the associate method in Laravel. I understand the idea, but I can't seem to get it to work.

使用（蒸馏）代码：

class User
{

    public function customer()
    {
        return $this->hasOne('Customer');
    }

}

class Customer
{

    public function user()
    {
        return $this->belongsTo('User');
    }

}

$user = new User($data);
$customer = new Customer($customerData);

$user->customer()->associate($customer);

我得到一个调用未定义的方法Illuminate\Database\Query\\ \\Builder :: associate（）当我尝试运行这个。

I get a Call to undefined method Illuminate\Database\Query\Builder::associate() when I try to run this.

从我可以看到，我完全按照文件。

From what I can read, I do it exactly as is stated in the docs.

我做错了什么？

推荐答案

我不得不承认当我第一次开始使用Laravel的关系时，我不得不一直参考文档，甚至在某些情况下，我没有得到正确的。

I have to admit that when I first started using Laravel the relationships where the part that I had to consistently refer back to the docs for and even then in some cases I didn't quite get it right.

为了帮助您， associate（）用于更新 belongsTo（）关系。看看你的代码，从 $ user-> customer（）返回的类是一个 hasOne 关系类，没有关联方法。

To help you along, associate() is used to update a belongsTo() relationship. Looking at your code, the returned class from $user->customer() is a hasOne relationship class and will not have the associate method on it.

如果你要做的另一回事。

If you were to do it the other way round.

$user = new User($data);
$customer = new Customer($customerData);

$customer->user()->associate($user);
$customer->save();

它可以作为 $ customer-> user（）是一个 belongsTo 关系。

It would work as $customer->user() is a belongsTo relationship.

要做到这一点，首先保存用户模型，然后将客户模型保存为：

To do this the other way round you would first save the user model and then save the customer model to it like:

$user = new User($data);
$user->save();

$customer = new Customer($customerData);
$user->customer()->save($customer);

编辑：可能没有必要先保存用户模型，但我一直都这样做，不知道为什么。

It may not be necessary to save the user model first but I've just always done that, not sure why.

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