Relating Type and Subtype

Question

What can I call a Subtipo searching for the tipo_id, I did some tests here but none successfully this is my first project.

Table of the Type

public $timestamps = true;
protected $table   = 'tipo';
protected $fillable = ['id','titulo'];
protected $hidden = [];

public function subtipo() 
{
    return $this->hasMany(Subtipo::class, 'tipo_id');
}

Subtype

public $timestamps = true;
protected $table   = 'subtipo';
protected $fillable = ['id','tipo_id','titulo'];
protected $hidden = [];

public function ticket() 
{
    return $this->hasMany(Ticket::class, 'subtipo_id');
}

public function tipo() 
{
    return $this->belongsTo(Tipo::class, 'tipo_id');
}

I will create a Ticket system, and put the open status read and closed in Tickets and needed to call these 'subtypes' by ticket type (id=1)

I was testing things like this on SubTipoRepository

public function __construct()
{
    $this->model = new SubTipo();
}


public function findByTipoTicket($tipo_id)
{
    return $this->model->where('tipo_id',1)->all();
}