Laravel Eloquent 关系对象陈旧，即使数据库中的数据正确

Question

我正在使用 Laravel 5.7，并且在两个 eloquent 模型之间有一个 one-to-one relationship。

我有一个运行良好的简单函数，并且正确的值保存到数据库中：

public function saveMarketingOriginInfo(Contact $contact, $data) {
    $contact->marketingOrigin()->create($data);        
    $this->makeOtherChangesByReference($contact->marketingOrigin);
    $contact->marketingOrigin->save();
    return $contact->marketingOrigin; 
}

但是，在为它编写功能测试时，我注意到它返回的对象是陈旧的（其属性中没有正确的值）。

只有当我将 return 语句更改为 return \App\Models\MarketingOrigin::find($contact->id); 时，我的测试才会通过。

（MarketingOrigin 使用 'contact_id' 作为主键。）

我做错了什么？

如何在不进行数据库读取查询 (find()) 的情况下返回刚刚保存在上一行 ($contact->marketingOrigin->save();) 中的相同对象？

---

更新以响应 cmets：

protected $table = 'marketing_origins';//MarketingOrigin class
protected $primaryKey = 'contact_id';
protected $guarded = [];
public function contact() {
    return $this->belongsTo('App\Models\Contact');
}

测试：

public function testSaveMarketingOriginInfo() {
    $helper = new \App\Helpers\SignupHelper();
    $contactId = 92934;
    $contact = factory(\App\Models\Contact::class)->create(['id' => $contactId]);
    $leadMagnetType = 'LMT';
    $audience = 'a60907';
    $hiddenMktgFields = [
        'audience' => $audience,
        'leadMagnetType' => $leadMagnetType
    ];
    $result = $helper->saveMarketingOriginInfo($contact, $hiddenMktgFields);
    $this->assertEquals($result->contact_id, $contactId, 'contact_id did not get saved');
    $this->assertEquals($result->campaignId, '6075626793661');
    $this->assertEquals($result->leadMagnetType, $leadMagnetType);
    $marketingOrigin = \App\Models\MarketingOrigin::findOrFail($contactId);
    $this->assertEquals($marketingOrigin->adsetId, '6088011244061');
    $this->assertEquals($marketingOrigin->audience, $audience);
    $this->assertEquals($marketingOrigin, $result, 'This is the assertion that fails; some properties of the object are stale');
}

Answer 1

这是因为关系尚未加载。

你可以尝试$contact->load('marketingOrigin'); 来加载关系：

public function saveMarketingOriginInfo(Contact $contact, $data) {
    $contact->marketingOrigin()->create($data);        
    $this->makeOtherChangesByReference($contact->marketingOrigin);
    $contact->marketingOrigin->save();
    $contact->load('marketingOrigin'); // <---- eager load the relationship
    return $contact->marketingOrigin; 
}