Eloquent: 附加相关记录

Question

2 个型号：FMType 和 Profile。 FMPType 有很多 Profile 记录（一对多关系）。

class FMPType extends Model
{
    public function profiles()
    {
        return $this->hasMany(Profile::class, 'fmptype_id');
    }
}

和

class Profile extends Model
{
    public function fmptype() {
        return $this->belongsTo(FMPType::class);
    }
}

我需要将一些 FMPType 复制到另一个，包括相关配置文件：

public function copy(Request $request, int $fmptype)
{
    $source = FMPType::findOrFail($fmptype);

    // Double type
    $target = $source->replicate();
    $target->name = $source->name . ' (Copy)';
    $target->save();

    // Double profiles
    foreach ($source->profiles as $profile) {
        $targetProfile = $profile->replicate();

        // Associate new Profile with new FMPType
        // Attempt 1:  add - nothing happened, works silent, link remains as in source
        $target->profiles->add($targetProfile);
        // Attempt 2: associate - error, no such method
        $target->profiles()->associate($targetProfile);

        $targetProfile->save();
    }

    return somewhere;
}

在这里，我无法使用 Eloquent 方法将子配置文件与父 FMPType 相关联。唯一的直接分配有效：$targetProfile->fmptype_id = $target->id，但从 Eloquent 的观点来看，这是错误的方式。

如何做到理所当然的联想？

更新 - 工作原理：

public function copy(Request $request, int $fmptype)
{
    $source = FMPType::findOrFail($fmptype);

    // Double type
    $target = $source->replicate();
    $target->name = $source->name . ' (Copy)';
    $target->save();

    // Double profiles
    foreach ($source->profiles as $profile) {
        $targetProfile = $profile->replicate();

        // Associate new Profile with new FMPType
        // Save both relation and $targetProfile
        $target->profiles()->save($targetProfile);
        // This save() is not required anymore
        // $targetProfile->save();
    }

    return somewhere;
}

Answer 1

HasMany关系没有关联，你应该使用save()。从我从你的代码中读到的内容来看，复制是不必要的。我猜你只是想在 $target.

上保存配置文件

foreach ($source->profiles as $profile) {
    $target->profiles()->save($targetProfile);
}

Eloquent: 附加相关记录

Eloquent: attach relative records

relationship

laravel

eloquent