Question

我无法弄清楚如何调用类函数，在这种情况下File->saveFile()通过父类Article

class Article extends Model {
  public $table = 'pl_gen_article';

  public function background_image () {
    return $this->morphOne('App\Ubercms\File', 'fileable');
  }
}

class File extends Model {
  public $table = 'ubercms_file';

  public function saveFile (UploadedFile $file) {}
}


$articleId = \Route::input('id');
$article = Article::findOrFail($articleId);
$file = $request->file('image');

// ----------------------
// Attempts

// 1.
$article->background_image->saveFile($file)

// 2.
$image = new $article->background_image();
$image->saveFile($file);

如何从File模型创建Article模型实例？

Answer 1

通过Laravel Api文档跟踪$article->background_image()作为MorphOne实例的响应，我可以调用firstOrNew返回File实例，我能够之后致电saveFile。

$model = $article->background_image()->firstOrNew([]);
$model->saveFile($file);

调用关联的eloquent模型的类方法

1 个答案: