Trying to get property of non-object - Laravel 5 - php

Question

I'm trying to echo out the name of the user in my article and I'm getting the
ErrorException: Trying to get property of non-object
My code:
Models
1. News
class News extends Model
{
public function postedBy()
{
return $this->belongsTo('App\User');
}
protected $table = 'news';
protected $fillable = ['newsContent', 'newsTitle', 'postedBy'];
}
2. User
class User extends Model implements AuthenticatableContract,
AuthorizableContract,
CanResetPasswordContract
{
use Authenticatable, Authorizable, CanResetPassword;
protected $table = 'users';
protected $fillable = ['name', 'email', 'password'];
protected $hidden = ['password', 'remember_token'];
}
Schema
table users
table news
Controller
public function showArticle($slug)
{
$article = News::where('slug', $slug)->firstOrFail();
return view('article', compact('article'));
}
Blade
{{ $article->postedBy->name }}
When I try to remove the name in the blade {{ $article->postedBy }} it outputs the id, but when I try to add the ->name there it says Trying to get property of non-object but I have a field namein my table and aUser` model. Am I missing something?

Answer 1

Is your query returning array or object? If you dump it out, you might find that it's an array and all you need is an array access ([]) instead of an object access (->).

Answer 2

I got it working by using Jimmy Zoto's answer and adding a second parameter to my belongsTo. Here it is:
First, as suggested by Jimmy Zoto, my code in blade
from
$article->poster->name
to
$article->poster['name']
Next is to add a second parameter in my belongsTo,
from
return $this->belongsTo('App\User');
to
return $this->belongsTo('App\User', 'user_id');
in which user_id is my foreign key in the news table.

Answer 3

If you working with or loops (for, foreach, etc.) or relationships (one to many, many to many, etc.), this may mean that one of the queries is returning a null variable or a null relationship member.
For example: In a table, you may want to list users with their roles.
<table>
<tr>
<th>Name</th>
<th>Role</th>
</tr>
#foreach ($users as $user)
<tr>
<td>{{ $user->name }}</td>
<td>{{ $user->role->name }}</td>
</tr>
#endforeach
</table>
In the above case, you may receive this error if there is even one User who does not have a Role. You should replace {{ $user->role->name }} with {{ !empty($user->role) ? $user->role->name:'' }}, like this:
<table>
<tr>
<th>Name</th>
<th>Role</th>
</tr>
#foreach ($users as $user)
<tr>
<td>{{ $user->name }}</td>
<td>{{ !empty($user->role) ? $user->role->name:'' }}</td>
</tr>
#endforeach
</table>
Edit:
You can use Laravel's the optional method to avoid errors (more information). For example:
<table>
<tr>
<th>Name</th>
<th>Role</th>
</tr>
#foreach ($users as $user)
<tr>
<td>{{ $user->name }}</td>
<td>{{ optional($user->role)->name }}</td>
</tr>
#endforeach
</table>
If you are using PHP 8, you can use the null safe operator:
<table>
<tr>
<th>Name</th>
<th>Role</th>
</tr>
#foreach ($users as $user)
<tr>
<td>{{ $user?->name }}</td>
<td>{{ $user?->role?->name }}</td>
</tr>
#endforeach
</table>

Answer 4

I implemented a hasOne relation in my parent class, defined both the foreign and local key, it returned an object but the columns of the child must be accessed as an array.
i.e. $parent->child['column']
Kind of confusing.

Answer 5

REASON WHY THIS HAPPENS (EXPLANATION)
suppose we have 2 tables users and subscription.
1 user has 1 subscription
IN USER MODEL, we have
public function subscription()
{
return $this->hasOne('App\Subscription','user_id');
}
we can access subscription details as follows
$users = User:all();
foreach($users as $user){
echo $user->subscription;
}
if any of the user does not have a subscription, which can be a case.
we cannot use arrow function further after subscription like below
$user->subscription->abc [this will not work]
$user->subscription['abc'] [this will work]
but if the user has a subscription
$user->subscription->abc [this will work]
NOTE: try putting a if condition like this
if($user->subscription){
return $user->subscription->abc;
}

Answer 6

It happen that after some time we need to run
'php artisan passport:install --force
again to generate a key this solved my problem ,

Answer 7

I had also this problem. Add code like below in the related controller (e.g. UserController)
$users = User::all();
return view('mytemplate.home.homeContent')->with('users',$users);

Answer 8

Laravel optional() Helper is comes to solve this problem.
Try this helper so that if any key have not value then it not return error
foreach ($sample_arr as $key => $value) {
$sample_data[] = array(
'client_phone' =>optional($users)->phone
);
}
print_r($sample_data);

Answer 9

Worked for me:
{{ !empty($user->role) ? $user->role->name:'' }}

Answer 10

In my case the problem was in wrong column's naming:
In model Product I've tried to access category relationship instance to get it's name, but both column name and relationship had the same name:
category
instead of:
category_id - for column name
category - for relationship
Setting up key name in relationship definition like
public function category():hasOne
{
return $this->hasOne(Category::class,'category');
}
didn't help because as soon as Laravel found property named category gave up on looking for relationship etc.
Solution was to either:
change property name (in model and database) or
change relationship name (Eg. productCategory )

Answer 11

It wasn't an error in my case. However, this happened to me when I was trying to open users.index, because while testing I've deleted some data from the 'STUDENTS' table and in the 'USERS' table, a foreign key ('student_id') represents the 'STUDENTS' table. So, now when the system tries to access the 'USERS' table in which foreign key ('student_id') is null since the value got deleted from the 'STUDENTS' table.
After checking for hours when I realise this, I insert the same data again in the 'STUDENTS' table and this resolved the issue.