Laravel: Trying to get property of non object - php

Question

I have been writing a web application in the Laravel framework andhave come across an issue I am having with getting certain data for a user. The user structure of my web application is based on a main users table, then I have an RP table for all the users statistics such as health, energy, items they own, and so on.
When visiting a page I am trying to display this data on I am receiving the following error
Trying to get property of non-object (View: C:\workspace\mainwebsite\resources\views\frontend\home.blade.php)
O simply tried to print out the user_id column of the roleplay table for the user (and yes, I have tried other columns they output the same result)
<div class="panel panel-default">
<div class="panel-body">
{{ Auth::user()->roleplay->user_id }}
</div>
</div>
Here is my user table class:
<?php
namespace App\Database\Website\User;
use Hash;
use Eloquent;
use \Illuminate\Auth\Authenticatable;
use \Illuminate\Contracts\Auth\Authenticatable as Authentication;
class Player extends Eloquent implements Authentication
{
use Authenticatable;
protected $primaryKey = 'id';
protected $table = 'users';
public $timestamps = false;
protected $fillable = [];
public function setPasswordAttribute($value)
{
$this->attributes['password'] = Hash::make($value);
}
public function setUsernameAttribute($value)
{
return $this->attributes['username'] = $value;
}
public function roleplay()
{
return $this->hasOne('App\Database\Website\User\Roleplay', 'user_id');
}
}
Here is my roleplay table class:
<?php
namespace App\Database\Website\User;
use Eloquent;
class Roleplay extends Eloquent
{
protected $primaryKey = 'id';
protected $table = 'srp_user_statistics';
public $timestamps = false;
protected $fillable = ['user_id'];
public function user()
{
return $this->belongsTo('App\Database\Website\User\Player', 'user_id', 'id');
}
}

Answer 1

Check to make sure that your current user has a roleplay object. Eloquent will return null for empty relationships.
<div class="panel panel-default">
#if(Auth::user()->roleplay)
<div class="panel-body">
{{ Auth::user()->roleplay->user_id }}
</div>
#endif
</div>
Question: why not just get the authorized user's id ({{Auth::user()->id}}) ? It appears that the roleplay object is related to the user on that id anyway; why go through a relationship to fetch an id that you already have?
Related:
Laravel Blade template how to return null instead of ErrorException when trying to get property of non-object

Answer 2

Probably, the authentication doesn't work in your webapp.

Answer 3

This is pretty basic debugging, you just need to figure out what part of that expression is not returning an object.
If the user isn't logged in, then Auth::user() would return null and since you are chaining ->roleplay after that, it would give you this error.
If Auth::user() is returning something but Auth::user()->roleplay returns null, then you would get this error because you are trying to chain ->user_id onto the end of null. The likely cause for this would be there is no roleplay data in the database for the logged in user or there is something wrong with your relationship.

Answer 4

By seeing your problem, it seems that you're fetching user's roleplay without actually checking that what auth()->user() is originally returning. If there isn't any authenticated user, it will return null.
You should use auth()->check() before fetching user from auth like this:
<div class="panel panel-default">
<div class="panel-body">
{{ (auth()->check()) ? auth()->user()->roleplay->user_id : '' }}
</div>
</div>
If the user is currently authenticated, then you should fetch the user details. auth()->check() returns a boolean value - false: if user isn't authenticated else it returns true
Hope this helps!