Call to a member function load() on null-CodePudding

Can someone tell me what to do in this error. The error is in this line. 'posts' => $author->posts->load('category', 'author')

Route::get('/authors/{author:username}', function(User $author){
    
        return view('frontend.posts', [
    
            'title' => 'Post By Author : $author->name',
    
            'posts' => $author->posts->load('category', 'author'),
    
        ]);
    
    });

this is my controller

class PostController extends Controller
{
    public function index()
    {
        return view('frontend.posts', [
            "title" => "All Posts",
            // "posts" => Post::all()
            "posts" => Post::latest()->get()
        ]);
    }

    public function show(Post $post)
    {
        return view('frontend.post', [
            "title" => "Single Post",
            "post" => $post
        ]);
    }

}

this is my models

class Post extends Model
{
    use HasFactory;

    protected $guarded = ['id'];
    protected $with = ['category', 'author'];

    public function category(){
        return $this->belongsTo(Category::class);
    }

    public function author(){
        return $this->belongsTo(User::class, 'user_id');
    }
}

and this is my user models

class User extends Authenticatable
{
    use HasApiTokens;
    use HasFactory;
    use HasProfilePhoto;
    use Notifiable;
    use TwoFactorAuthenticatable;


    public function post(){
        return $this->hasMany(Post::class);
    }
}

I have this previous error to "foreach() argument must be of type array|object, null given". I want to display blog posts from certain users. This is the code from posts.blade.php.

        @foreach ($posts as $post)
        <div >
        <h4 >
            <a href="/posts/{{ $post->slug }}" 
            >
                {{ $post->title }}
            </a>
        </h4>
        <p >
            {{ $post->excerpt }}
        </p>
        <div >
            <span >
                <span>
                    <span >By</span> <a  href="/authors/{{ $post->author->username }}">{{ $post->author->name }}</a>  
                    <span >|</span>
                </span>
                <span>
                    <a  href="/categories/{{ $post->category->slug }}">{{ $post->category->name }}</a>
                    <span >|</span>
                </span>
                <span>
                    8 Comments
                </span>
            </span>
            <a href="/posts/{{ $post->slug }}" >
                Continue Reading
                <i ></i>
            </a>
        </div>
        </div>
    @endforeach

CodePudding user response：

The name of the relationship in User is post but in your controller you used posts.

The following should probably work:

Route::get('/authors/{author:username}', function(User $author){
    
        return view('frontend.posts', [
    
            'title' => 'Post By Author : $author->name',
    
            'posts' => $author->load('post.category'),
    
        ]);
    
    });