Laravel Relationship: Trying to get property 'description' of non-object - php

Question

I'm facing against this problem since yesterday.
I have a db table called resources have a foreign key linked to another table called category.
I'm trying to retrieve the description field in my blade view, but I get this error:
Trying to get property 'description' of non-object.
My blade view:
#extends('templates.header')
#section('section')
<div class="p-10 grid grid-cols-1 sm:grid-cols-1 md:grid-cols-3 lg:grid-cols-3 xl:grid-cols-3 gap-5">
#foreach($resources as $resource)
<div class="max-w-sm rounded overflow-hidden shadow-lg">
{{-- <img class="w-full" src="#" alt="Mountain"> --}}
<div class="px-6 py-4">
<div class="font-bold text-xl mb-2">
{{ $resource->name }}
</div>
<p class="text-gray-700 text-base">
{{ $resource->description }}
</p>
</div>
<div class="px-6 pt-4 pb-2">
<span class="inline-block bg-gray-200 rounded-full px-3 py-1 text-sm font-semibold text-gray-700 mr-2 mb-2">{{ $resource->categor->description }}</span>
<span class="inline-block bg-gray-200 rounded-full px-3 py-1 text-sm font-semibold text-gray-700 mr-2 mb-2">{{ $resource->status }}</span>
<span class="inline-block bg-gray-200 rounded-full px-3 py-1 text-sm font-semibold text-gray-700 mr-2 mb-2">{{ $resource->centerId }}</span>
<button type="submit" class="inline-flex justify-center py-2 px-4 border border-transparent shadow-sm text-sm font-medium rounded-md text-white bg-indigo-600 hover:bg-indigo-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500">
Prenota
</button>
</div>
</div>
#endforeach
</div>
#endsection
My Resource Model:
namespace App\Models;
use App\Models\Category;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class Resource extends Model
{
use HasFactory;
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = [
'name',
'description',
'category',
'inventoryN',
'status',
'centerId',
];
/**
* The attributes that should be hidden for arrays.
*
* #var array
*/
protected $hidden = [
];
/**
* The attributes that should be cast to native types.
*
* #var array
*/
protected $casts = [
];
public function category()
{
return $this->hasOne(Category::class, 'id', 'category');
}
}
My Category Model:
namespace App\Models;
use App\Models\Resource;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class Category extends Model
{
use HasFactory;
protected $table = 'categories';
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = [
'description',
];
/**
* The attributes that should be hidden for arrays.
*
* #var array
*/
protected $hidden = [
];
/**
* The attributes that should be cast to native types.
*
* #var array
*/
protected $casts = [
];
public function resource()
{
return $this->belongsTo(Resource::class, 'category');
}
}
And lastly my ResourceController:
namespace App\Http\Controllers;
use App\Models\Category;
use App\Models\Resource;
use Illuminate\Http\Request;
class ResourceController extends Controller
{
public function index()
{
$resources = Resource::with('category')->get();
return view('resources', compact('resources'));
}
}
This is a dd of "$resources":
dd of $resources

Answer 1

You have a few mistakes here.
The first is in the Blade. You need to fix a typo
$resource->categor->description
// should be
$resource->category->description
Then I recommend changing your schema by changing your resources column from category to category_id.
This will help Laravel auto populate the values in the below snippets.
Next, you need to fix your relationships.
In the Resources model, you need
public function category()
{
return $this->hasOne(Category::class);
}
I have removed the second and third parameters, these are autofilled by Laravel; and since you are using Laravel's naming schemes, you don't need it.
What you had previously was stating that the table was the singular variant of category, which it wasn't.
Then you need to change your Category model to
public function resource()
{
return $this->belongsTo(Resource::class);
}
The reason this was failing is because Laravel was returning null, because the column names weren't quite correct.
It's easier to just have a more standard naming structure in your Database as it helps other developers, and makes your life easier when using Laravel.

Answer 2

There is a typo in your category viewing. I think that's the problem.
{{ $resource->categor->description }}
vs.
{{ $resource->category->description }}