如何使用formData更新laravel中的帖子？

<form id="updatePostForm" enctype="multipart/form-data">
    <input type="hidden" name="post_id" value="{{ $post->id }}">
    <input type="text" name="title" value="{{ $post->title }}">
    <textarea name="content">{{ $post->content }}</textarea>
    <input type="file" name="image">
    <button type="submit">更新帖子</button>
</form>

$('#updatePostForm').submit(function(e) {
    e.preventDefault();
    
    var formData = new FormData(this);
    
    $.ajax({
        url: '/posts/update',
        type: 'POST',
        data: formData,
        processData: false,
        contentType: false,
        success: function(response) {
            // 更新成功后的处理
        }
    });
});

public function updatePost(Request $request)
{
    $postId = $request->input('post_id');
    $post = Post::find($postId);
    
    $post->title = $request->input('title');
    $post->content = $request->input('content');
    
    if ($request->hasFile('image')) {
        // 处理上传的图片文件
        $image = $request->file('image');
        // 将图片保存到服务器或者云存储中
        // $post->image = $uploadedImagePath;
    }
    
    $post->save();
    
    return response()->json(['success' => true]);
}