[FIXED] How to fix Call to a member function isAdmin() on null

Issue

I have a route : Route::get('/TransactionHistory','QuoteController@transactionHistory');

In Controller QuoteController, I have a function as:

public function transactionHistory(){
         if(Auth::user()->isAdmin())
        {
               $res= DB::table('products_products')
->select('users_users.display_name','products_products.name','products_products.id','products_products.user_id','products_products.quantity_type','buy_product.price','buy_product.rating','buy_product.mileage_name','buy_product.id as buy_id')
->join('buy_product','products_products.id','=','buy_product.product_id')
->join('users_users','buy_product.user_id','=','users_users.id')
->get();
        }
        else{
       $u_id=auth()->user()->id;
      $res= DB::table('products_products')
->select('products_products.name','products_products.id','products_products.user_id','products_products.quantity_type','buy_product.price','buy_product.rating','buy_product.mileage_name','buy_product.id as buy_id')
->join('buy_product','products_products.id','=','buy_product.product_id')

->where('buy_product.user_id','=',$u_id)
->get();}
        
    return view('templates::pagetwigs/transaction-history')->with('details',$res);
    } 

On routing the path I got error as :Call to a member function isAdmin() on null

How to fix this.

Solution

Add middleware in the route or in the constructor of controller as shown:

public function __construct()
{
      $this->middleware('auth');
    
}

This will not allow you to access the page unless you are logged in . This will always check that Auth::user() is not null

Answered By - Manmeet Singh Raina

Answer Checked By - Mildred Charles (PHPFixing Admin)