Attempt to read property "username" on null - php

Question

While trying to create fake posts on laravel 8, I met with some errors, first it wasn't creating the posts, then I changed the username to nullable and it created it but I keep having;
Attempt to read property "username" on null
So, I went back to my database and I changed it back to none, but I still receive the same error code, I will post my codes now...
index.blade.php
#extends('layouts.app')
#section('content')
<div class="flex justify-center">
<div class="w-8/12 bg-white p-6 rounded-lg">
<form action="{{ route('posts') }}" method="post" class="mb-4">
#csrf
<div class="mb-4">
<label for="body" class="sr-only">Body</label>
<textarea name="body" id="body" cols="30" rows="4" class="by-gray-100 border-2
w-full p-4 rounded lg #error('body') border-red-500 #enderror" placeholder="Post something!"></textarea>
#error('body')
<div class="text-red-500 mt-3 text-sm">
{{$message}}
</div>
#enderror
</div>
<div>
<button type="submit" class="bg-blue-500 text-white px-4 py-2 rounded
font-medium">Post</button>
</div>
</form>
#if ($posts->count())
#foreach ($posts as $post)
<div class="mb-4">
{{ $post->user->username }}
<span class="text-gray-600 text-sm">{{ $post->created_at->diffForHumans() }}</span>
<p class="mb-2">{{ $post->body }}</p>
</div>
#endforeach
{{ $posts->links() }}
#else
There are no posts...
#endif
</div>
</div>
#endsection
UserFactory.php
<?php
namespace Database\Factories;
use App\Models\User;
use Illuminate\Database\Eloquent\Factories\Factory;
use Illuminate\Support\Str;
class UserFactory extends Factory
{
/**
* The name of the factory's corresponding model.
*
* #var string
*/
protected $model = User::class;
/**
* Define the model's default state.
*
* #return array
*/
public function definition()
{
return [
'username' => $this->faker->username,
'name' => $this->faker->name,
'email' => $this->faker->unique()->safeEmail,
'email_verified_at' => now(),
'password' => '$2y$10$92IXUNpkjO0rOQ5byMi.Ye4oKoEa3Ro9llC/.og/at2.uheWG/igi', // password
'remember_token' => Str::random(10),
];
}
/**
* Indicate that the model's email address should be unverified.
*
* #return \Illuminate\Database\Eloquent\Factories\Factory
*/
public function unverified()
{
return $this->state(function (array $attributes) {
return [
'email_verified_at' => null,
];
});
}
}
User.php
<?php
namespace App\Models;
use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
class User extends Authenticatable
{
use HasFactory, Notifiable;
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = [
'name',
'email',
'password',
'username',
];
/**
* The attributes that should be hidden for arrays.
*
* #var array
*/
protected $hidden = [
'password',
'remember_token',
];
/**
* The attributes that should be cast to native types.
*
* #var array
*/
protected $casts = [
'email_verified_at' => 'datetime',
];
public function posts(){
return $this->hasMany(Post::class);
}
}
PostFactory.php
<?php
namespace Database\Factories;
use App\Models\Post;
use Illuminate\Database\Eloquent\Factories\Factory;
class PostFactory extends Factory
{
/**
* The name of the factory's corresponding model.
*
* #var string
*/
protected $model = Post::class;
/**
* Define the model's default state.
*
* #return array
*/
public function definition()
{
return [
'body' => $this->faker->sentence(20),
];
}
}
Post.php
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class Post extends Model
{
use HasFactory;
protected $fillable= [
'body',
'user_id',
];
/**
* Get the user that owns the Post
*
* #return \Illuminate\Database\Eloquent\Relations\BelongsTo
*/
public function user()
{
return $this->belongsTo(User::class);
}
}

Answer 1

It was because I had an existing user_id in my code so, I deleted it from the database and it worked