php - Laravel 4.2-使用:: firstOrCreate并确定实际发生了什么？

在Laravel 4.2中使用Model::firstOrCreate时，是否有办法知道是先发生还是先发生？

让我解释一下，我的理解是::: firstOrCreate会创建一条记录(如果该记录不存在)，或者返回包含参数数组数据的记录值。

所以，如果我有这样的事情:

// Auth::user()->id; returns 7

$person = Persons::firstOrCreate(array(
    'approver' => 123,
    'receiver' => Auth::user()->id,
    'plan' => 'gold',
));

我有这些记录

  approver | receiver  |  plan
____________________________________
    123    |     7     |  silver
____________________________________
    128    |     7     |  gold
____________________________________
    123    |     7     |  platinum
____________________________________

然后将创建一个新记录

  approver | receiver  |  plan
____________________________________
    123    |     7     |  silver
____________________________________
    128    |     7     |  gold
____________________________________
    123    |     7     |  platinum
____________________________________
    123    |     7     |  gold
____________________________________

如果我再次运行以上代码，则不会创建新值，并且将返回此记录

  approver | receiver  |  plan
____________________________________

    123    |     7     |  gold
____________________________________

但是如果我的代码看起来像这样

$person = Persons::firstOrCreate(array(
    'approver' => 123,
    'receiver' => Auth::user()->id
));

这些记录将被退回

  approver | receiver  |  plan
____________________________________
    123    |     7     |  silver
____________________________________
    123    |     7     |  platinum
____________________________________
    123    |     7     |  gold
____________________________________

如果我对:: firstOrCreate的理解不正确，请帮助我更好地理解它。

正如我提到的，我很想知道是否有一种方法可以确定是否创建新记录？

最佳答案

该模型具有wasRecentlyCreated属性:

$person = Persons::firstOrCreate([
    'approver' => 123,
    'receiver' => auth()->id(),
    'plan' => 'gold',
]);

if ($person->wasRecentlyCreated) {
    // $person was created
} else {
    // $person was fetched
}

对于较旧的Laravel版本，您可以使用firstOrNew实现所需的功能:

$person = Persons::firstOrNew([
    'approver' => 123,
    'receiver' => Auth::user()->id,
    'plan' => 'gold',
]);

if (! $person->id) {
    $person->save();

    // $person was created...
} else {
    // $person was fetched...
}