如何只编辑一篇文章而不是迭代循环所有文章？

我foreach($user->posts as $post)在我的输入字段上使用，以便我能够使用它，value="{{ old('about') ?? $post->about }}"因为没有迭代我在使用该值时出现错误（试图获取对象的属性）。但是，当我尝试编辑时，我不知道我的 edit.blade 看起来像这样我只需要一个输入字段，我只需要一个特定的帖子，我正在尝试编辑

编辑刀片.php

@extends('layouts.app')

@section('content')
<div class="container">
<form action="/p/update/{{ $user->id}}" enctype="multipart/form-data" method="POST">

@csrf
@method ('PATCH')

<div class="col-8 offset-2">
<div class="form-group row">

@foreach($user->posts as $post)
    <label for="about" class="col-md-4 col-form-label text-md-right">{{ __(' post about') }}</label>

    <div class="col-md-6">
        <input id="about" type="text" class="form-control @error('about') is-invalid @enderror" name="about"  value="{{ old('about') ?? $post->about }}" required autocomplete="about" autofocus>

    @error('about')
        <span class="invalid-feedback" role="alert">
            <strong>{{ $message }}</strong>
        </span>
    @enderror
    </div>
@endforeach

    <label for="image" class="col-md-4 col-form-label text-md-right">{{ __(' post image') }}</label>
    <input type="file", class="form-control-file" id ="image" name="image"  >
    @error('image')
            <div class="invalid-feedback" role="alert">
                <strong>{{ $message }}</strong> </div>
    @enderror
      <div class="btn btn-primary">
      <button> save </button>
      </div>
    </div> 
</div>
</form>
</div>
@endsection

路线

Route::get('/post/edit/{user}', 'PostController@edit')->name('post.edit');


Route::patch('/p/update/{user}', 'PostController@update')->name('post.update');

后控制器

 public function edit(User $user)
{
   

  return view('posts.edit', compact('user'));
}

 public function update(User $user)
{
$data = request()->validate([
    'about' => 'required',
    'image' => '',

  ]);

  if(request('image')){
    $imagePath = request('image')->store('uploads','public');
    $image = Image::make(public_path("storage/{$imagePath}"))->fit(500,500);
  
    $image->save();

    $imageArray = ['image' => $imagePath];

  }
  auth()->user()->posts()->update(array_merge( $data, $imageArray ?? [] ) );
  
  return redirect("/user/{$user->id} ");
}