Undefined property: App\Http\Controllers\CommentController::$comment - laravel

Question

I have a small project in which there should be a comment for each post. I tried to do this using the following code.
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Models\Comment;
use App\Repository\ICommentRepository;
class CommentController extends Controller
{
/**
* Write Your Code..
*
* #return string
*/
public function store(Request $request)
{
$request->validate([
'body'=>'required',
]);
$data = $request->all();
$data['user_id'] = auth()->user()->id;
$this->comment->createComment($data);
return back();
}
}
With the following error
‍‍Undefined property: App\Http\Controllers\CommentController::$comment
After a bit of searching, I realized my mistake and corrected it as follows
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Models\Comment;
class CommentController extends Controller
{
public function __construct(IAdminRepository $comment){
$this->comment = $comment;
}
/**
* Write Your Code..
*
* #return string
**/
public function store(Request $request)
{
$input = $request->all();
$request->validate([
'body'=>'required',
]);
$input['user_id'] = auth()->user()->id;
$this->comment->createPost($input);
return back();
}
}
Then I got the same error as before and it showed me the same code while I was changing the contents of the code
I tried to clear the cache with php artisan config:clear and php artisan optimize but nothing changed.
pleas help me

Answer 1

namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Models\Comment;
class CommentController extends Controller
{
private $comment;
public function __construct(IAdminRepository $comment){
$this->comment = $comment;
}
/**
* Write Your Code..
*
* #return string
**/
public function store(Request $request)
{
$input = $request->all();
$request->validate([
'body'=>'required',
]);
$input['user_id'] = auth()->user()->id;
$this->comment->createPost($input);
return back();
}
}
you did not define the $comment variable and you are trying to assign value to it.

Answer 2

You need to declare variable comment before the line for the constructor.
i.e
private $comment; //this line is important and it was missing in your code
public function __construct(IAdminRepository $comment){
$this->comment = $comment;
}

Answer 3

here is what she need
private $comment;
public function __construct(IAdminRepository $comment){
$this->comment = $comment;
}
if this is not working then you have something wrong in you IAdminRepository class