Laravel seeds wrong id values in many to many relations - php

Question

I currently learn Laravel 5.8 and created database where users can have two roles: admin or user stored in roles table. I tried to populate role_users intermediate table but Laravel doubles rows and seeds wrong data like this: Crazy ROLE_USER Table. role_id should be only 1 or 2. user_id should be unique. What did I do wrong?
User model:
public function roles() {
return $this->belongsToMany('App\Role', 'role_users')->withTimestamps();
}
Role model:
public function roles() {
return $this->belongsToMany('App\User', 'role_users')->withTimestamps();
}
create_role_users_table migration:
Schema::create('role_users', function (Blueprint $table) {
$table->bigIncrements('id');
$table->unsignedBigInteger('role_id');
$table->unsignedBigInteger('user_id');
$table->timestamps();
});
RoleUsersFactory factory:
$factory->define(RoleUser::class, function (Faker $faker) {
return [
'role_id' => Role::all()->random()->id,
'user_id' => User::all()->random()->id,];
});
RoleTableSeeder seeder:
$role_user = new Role();
$role_user->role = 'user';
$role_user->save();
$role_admin = new Role();
$role_admin->role = 'admin';
$role_admin->save();
DatabaseSeeder seeder:
$this->call(RoleTableSeeder::class);
factory(User::class, 5)->create()->each(function($user) {
$user->roles()->save(factory(RoleUser::class)->make());
});

Answer 1

create a role then.
$role = Role::create(['role_name' => 'admin']);
use attach()
factory(User::class, 100)->create()->each(function ($user) use ($role ) {
$role ->users()->attach($user);
});
Try the above code.
This will create 100 different users with admin as role.
you can add other roles like this.
hope this suite for you.

Answer 2

You have the wrong relationships (you state that you want all the users to have a single role, which should be a BelongsTo / HasMany).
On the User model, have this method:
public function role() {
return $this->belongsTo('App\Role');
}
Create this method on the Role model:
public function users() {
return $this->hasMany('App\User');
}
Delete the migration you made where the role_users table is created and create a new migration with the following code:
Schema::table('users', function(Blueprint $table) {
// remove the nullable if a user HAS to have a role at all times
$table->unsignedBigInteger('role_id')->nullable();
}
Now, as a last step, the seeders. Your Role-seeder is correct. You shouldn't change that. Change your User-seeder to the following:
factory(User::class, 100)->create(['role_id' => Role::all()->random()->id]);
This will create a database with 100 users, where each has a role of admin or normal user. You can get all the users attached to a role with $role->users and get the role of a user with $user->role.