live-chat application message and user model - php

Question

I'm developing a live chat application and i don't know which is the proper db structure. I thought that the best solution is to have a Message model that belongs to a Sender and to a Receiver. In this way things should work, but when i seed i have a lot of problems, like only the first user got the relations accessible. I share my code below.
Message Migration
public function up()
{
Schema::create('messages', function (Blueprint $table) {
$table->id();
$table->timestamps();
$table->text('content');
$table->foreignUuid('from_id')->references('uuid')->on('users');
$table->foreignUuid('to_id')->references('uuid')->on('users');
});
}
User migration
$table->id();
$table->uuid('uuid')->unique();
$table->string('name');
$table->string('email')->unique();
$table->timestamp('email_verified_at')->nullable();
$table->string('password');
$table->string('profile')->default(public_path('images/default_profile.jpg'));
$table->rememberToken();
$table->timestamps();
Message Model
class Message extends Model
{
use HasFactory;
protected $table = "messages";
public function sender()
{
return $this->belongsTo(User::class, 'from_id');
}
public function receiver()
{
return $this->belongsTo(User::class, 'to_id');
}
}
User model
public function sent()
{
return $this->hasMany(Message::class, 'from_id');
}
public function received()
{
return $this->hasMany(Message::class, 'to_id');
}
public function contacts()
{
DatabaseSeeder
User::factory()->create([
'name' => 'username',
'email' => 'admin#admin.com',
'password' => bcrypt('password')
]);
Message::factory()
->count(200)
->create();
User::factory()->count(10)->create();
$users = User::all();
$messages = Message::all();
User::all()->each(function ($user) use ($users) {
do {
$idsToAttach = $users->random(rand(1, 3))->pluck('id')->toArray();
$idsToAttach = array_diff($idsToAttach, array($user->id));
} while (count($idsToAttach) <= 0);
$user->contacts()->attach(
$idsToAttach
);
});
$messages->each(function ($message) use ($users) {
do {
$sender = $users->random(1)->pluck('uuid');
$receiver = $users->random(1)->pluck('uuid');
} while ($sender[0] == $receiver[0]);
$message->receiver()->associate(
$receiver[0]
);
$message->sender()->associate(
$sender[0]
);
$message->save();
});
}

Answer 1

your seeder can be way easier,
maybe in your user factory, you can override configure() method as below, and register an afterCreating callback as below:
public function configure(): UserFactory
{
return $this->afterCreating(Closure::fromCallable([$this, 'attachRelations']));
}
where attachRelations is a method that will be called after every user creation, you can do many things in there, things like :
function attachRelations(User $user)
{
// Assign a random amount of languages to a user
$languages = Language::all();
$user->languages()->sync($languages->random(rand(1, $languages->count())));
// Assign a fake avatar to a user, just a record no file
$avatar = Avatar::factory()->make();
$user->avatar()->save($avatar);
}
this way, I will attach a random amount of languages to each user, and also assign an avatar record, I hope you got the idea
laravel doc: Here
let me know if you need help