in laravel hasMany() relation is working but belongsTO not working - laravel-8

Question

i have two tables 1: users 2: roles
as for migration of users table like this
`
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
return new class extends Migration
{
/**
* Run the migrations.
*
* #return void
*/
public function up()
{
Schema::create('users', function (Blueprint $table) {
$table->id();
$table->foreignId('role_id')->constrained()->onDelete('cascade');
$table->string('name');
$table->string('username');
$table->string('email')->unique();
$table->timestamp('email_verified_at')->nullable();
$table->string('password');
$table->string('profile_image')->default('user.png');
$table->text('about')->nullable();;
$table->rememberToken();
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* #return void
*/
public function down()
{
Schema::dropIfExists('users');
}
};
`
as for roles table migration
`
<?php
use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
return new class extends Migration
{
/**
* Run the migrations.
*
* #return void
*/
public function up()
{
Schema::create('roles', function (Blueprint $table) {
$table->id();
$table->string('role_title');
$table->string('role_slug');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* #return void
*/
public function down()
{
Schema::dropIfExists('roles');
}
};
`
User mode
`
<?php
namespace App\Models;
// use Illuminate\Contracts\Auth\MustVerifyEmail;
use App\Models\Role;
use Laravel\Sanctum\HasApiTokens;
use Illuminate\Notifications\Notifiable;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Foundation\Auth\User as Authenticatable;
class User extends Authenticatable
{
use HasApiTokens, HasFactory, Notifiable;
public function role(){
return $this->belongsTo(Role::class);
}
/**
* The attributes that are mass assignable.
*
* #var array<int, string>
*/
protected $fillable = [
'name',
'email',
'password',
];
/**
* The attributes that should be hidden for serialization.
*
* #var array<int, string>
*/
protected $hidden = [
'password',
'remember_token',
];
/**
* The attributes that should be cast.
*
* #var array<string, string>
*/
protected $casts = [
'email_verified_at' => 'datetime',
];
}
`
Role model
`
<?php
namespace App\Models;
use App\Models\User;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Factories\HasFactory;
class Role extends Model
{
use HasFactory;
public function users(){
return $this->hasMany(User::class);
}
}
`
so i have tried
App\Models\Role::find(1)->users;
so it is returning
`
Illuminate\Database\Eloquent\Collection {#4831
all: [
App\Models\User {#4829
id: 2,
role_id: 1,
name: "zahid",
username: "admin",
email: "admin#gmail.com",
email_verified_at: null,
#password: "$2y$10$6Up.B4.0gytPsVWOT/f0eeG4yk.u466FDRNf34yYZwxbwyKJh8o8u",
updated_at: null,
},
],
}
`
and
App\Models\User::find(2)->roles;
it is returning null
please tell me where is my fault in code why my belogsTo not working. i want for one use lke jone or nike contains only one role lke author or admin or writer etc. but one role lke admin or it could be contain multiple users lke multiple user can be admin or author.
is in my logic any fault or in code above.
plz help me. and thank for advaced for all helpfull code loves.