Laravel将Model的类型发送给函数

Question

我有一种方法可以将文件上传到一个表，然后使用Laravel的sync()方法将这些文件链接到给定的模型。

目前，我在EventController中有一个方法，该方法用于通过数据透视表将文件链接到事件。

该方法的路由如下：

Route::post('events/{event}/files/add', 'Editable\EventController@attachFiles');

方法如下：

/**
 * Handle the attaching of a file to an Event
 * Gets the files uploaded and adds them to the Template Library
 * After this the files are associated with an Event
 *
 * @return void
 */
public function attachFiles(Request $request, Event $event)
{
    $this->validate($request, [
        'files.*' => 'sometimes|file|mimes:pdf|max:50000'
    ]);

    // Initialize a file upload counter
    $fileCount = 0;

    // Initialize an empty array
    $filenameArray = [];

    // Ensure that the request contains files
    if ($request->hasfile('files')) {
        $files = $request->file('files');
        $category = 'Post Event Documents';

        // Loop through each file and add it to storage
        foreach ($files as $file) {

            // Get the meta data for each file
            $name = $file->getClientOriginalName();
            $extension = strtolower($file->getClientOriginalExtension());
            $type = 'document';
            $size = $file->getSize();
            $path = $file->storeAs('library/' . $category . '/' . $event->id, $name);

            // Create the database entries for the newly uploaded files
            FileMetaData::firstOrCreate(
                [
                    'name' => $name,
                    'extension' => $extension
                ],
                [
                    'category' => $category,
                    'type' => $type,
                    'size' => $size,
                    'filepath' => $path
                ]);

            $fileCount++;
            $filenameArray[] = $name;
        }

        $files = FileMetaData::whereIn('name', $filenameArray)->get()->pluck('id');

        $event->files()->syncWithoutDetaching($files);

        return back()->with('success', $fileCount . ' files added to this Event');

        return redirect()->back();
    }
}

我想将此功能移到另一个控制器中，该控制器处理我当前所有的文件上传，但是要使用sync()，您需要能够传递模型类型。

此刻，我在TemplateController中用一种完全相同的方法玩弄：

public function uploadAndSync(Request $request)
{
    // Get every extension that we allowed
    $all_ext = implode(',', $this->allExtensions());

    $this->validate($request, [
        'files.*' => 'required|file|mimes:' . $all_ext . '|max:50000'
    ]);

    // Initialize a file upload counter
    $fileCount = 0;

    // Initialize an empty array
    $filenameArray = [];

    // Get the category and department from the form
    $category = $request->get('category');

    // Ensure that the request contains files
    if ($request->hasfile('files')) {
        // Loop through each file and add it to storage
        foreach ($request->file('files') as $file) {

            // Get the meta data for each file
            $name = $file->getClientOriginalName();
            $extension = strtolower($file->getClientOriginalExtension());
            $type = $this->getType($extension);
            $size = $file->getSize();

            // Upload all the given files to Storage, within a specific directory
            if ($category != '') {
                $path = $file->storeAs('library/' . $category, $name);
                $department = null;
            }

            // Grab the filepath so we can store it in the database
            $file->filepath = $path;

            // Create the database entries for the newly uploaded files
            FileMetaData::firstOrCreate(
                [
                    'name' => $name,
                    'extension' => $extension
                ],
                [
                    'category' => $category,
                    'type' => $type,
                    'size' => $size,
                    'filepath' => $path
                ]);

            $fileCount++;
            $filenameArray[] = $name;
        }

        $files = FileMetaData::whereIn('name', $filenameArray)->get()->pluck('id');

        $event->files()->syncWithoutDetaching($files);

        return back()->with('success', $fileCount . ' files added to this Event');

        return redirect()->back();
    }
}

但是，除了$event之外，还有一种方法可以推断出文件应该与哪个模型同步？

因此在routes/web.php中会有点像这样：

Route::post('upload/{model}/files/add', 'Editable\TemplateController@uploadAndSync');

这样我就不需要每个Controller中的一种方法来处理同步文件。

在我的Event模型中，我定义了与文件的关系。

/**
 * Get the files attached to this Event
 *
 * @return void
 */
public function files()
{
    return $this->morphToMany(FileMetaData::class, 'attachable');
}

这是数据透视表：