Both row from one table in a drop down - Laravel 5.2 - php

Question

working with Laravel 5.2 and Laravel Collective here. So I have this problem - I'm trying to make a drop down (select) with the first_name and the last_name of my user but in my User table first_name and last_name are in different rows. How can i display them both together in one drop down?
Here what i Have in the controller:
'teachers'=>User::where('type','=','teacher')->lists('first_name', 'last_name','id'),
With this I only see first_name.
And in the view:
{!! Form::select('teacher_name', $teachers, null, ['class' => 'form-control']) !!}
The table structure:
Schema::create('users', function (Blueprint $table) {
$table->increments('id');
$table->string('username');
$table->string('password');
$table->string('first_name', 20);
$table->string('last_name', 20);
$table->integer('class_id')
->unsigned()
->nullable();
$table->enum('type', ['admin', 'teacher', 'student']);
$table->rememberToken();
$table->timestamps();
Someone?

Answer 1

Attributes come in handy when doing things like this. In your teacher's model, you could put:
public function getFullNameAttribute()
{
return $this->first_name . ' ' . $this->last_name;
}
Then in your controller put:
$teachers = Teacher::lists('full_name','id');
..and your view will now work as it is.

Answer 2

You can try something like :
$teachers = User::where('type', 'teacher')->get();
$teachersArray = [];
foreach ($teachers as $teacher){
$teachersArray[$teacher->id] = $teacher->first_name.' '.$teacher->last_name;
}
Passing the $teachersArray to your view and in your form :
{!! Form::select('teacher_name', $teachersArray, null, ['class' => 'form-control']) !!}