how do I call a variable in Laravel - php

Question

I'm trying to call a variable from a table, but I'm getting an error "Undefined variable $user". I'm trying to make the program display the Username from the user from the table.
I'm using 2 tables, tribes which represents something like a group, and a user which represents.. well.. user.
So I'm trying to connect the two by displaying the creator of a certain "tribe".
User controller:
<?php
namespace App\Http\Controllers;
Use App\Models\User;
use Illuminate\Http\Request;
class tribesController extends Controller
{
public function index($user)
{
$user = User::findOrFail($user);
return view('home',[
'user'=>$user,
]);
}
}
Homepage:
#extends('layouts.app')
#section('content')
<div class="container">
<div class="row justify-content-center">
<div class="col-md-8">
<div class="card">
<div class="card-header">{{ __('Dashboard') }}</div>
<div class="card-body">
#if (session('status'))
<div class="alert alert-success" role="alert">
{{ session('status') }}
</div>
#endif
{{ $user->username }}
</div>
</div>
</div>
</div>
</div>
#endsection
Router:
<?php
use Illuminate\Support\Facades\Route;
/*
Route::get('/', function () {
return view('welcome');
});
Route::get('/home', function () {
return view('home');
});
Route::get('/playlist', function () {
return view('playlist');
});
Route::get('/tribe', function () {
return view('tribe');
});
Route::get('/edit', function () {
return view('edit');
});
Auth::routes();
Route::get('/tribe/{user}', [App\Http\Controllers\TribesController::class, 'index'])->name('tribe.index');
Database file:
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
class CreateTribesTable extends Migration
{
/**
* Run the migrations.
*
* #return void
*/
public function up()
{
Schema::create('tribes', function (Blueprint $table) {
$table->id();
$table->unsignedBigInteger('user_id');
$table->string('title');
$table->string('genre');
$table->string('filepath')->nullable();
$table->timestamps();
$table->index('user_id');
});
}
/**
* Reverse the migrations.
*
* #return void
*/
public function down()
{
Schema::dropIfExists('tribes');
}
}
model:
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
class tribe extends Model
{
public function user(){
return $this->belongsTo(User::class);
}
use HasFactory;
}

Answer 1

You are treating the url parameter as a object, it can't be an object until you get it. Pass in a user id and then query the ORM for a user matching that id then you can use it as an object!