I have the following relations:

Discount:

<?php
    class Discount extends Eloquent {
        protected $table = 'discount';
        public $timestamps = true;

        public function titles()
        {
            return $this->hasMany('Translation', 'labelId', 'titleLabelId');
        }
    }
?>

Translation:

 <?php
        class Translation extends Eloquent {
            protected $table = 'translations';
            public $timestamps = false;

            protected $fillable = array('phrase');

            public function language()
            {
                return $this->belongsTo('Language', 'languageId');
            }

            public function label()
            {
                return $this->belongsTo('Label', 'labelId');
            }
}
?>

Label:

<?php
    class Label extends Eloquent {
        protected $table = 'label';
        public $timestamps = false;

        protected $fillable = array('key');

        public function translations()
        {
            return $this->hasMany('Translation', 'labelId', 'id');
        }
    }
?>

There are three database tables with the following columns:

Discount:

id | titleLabelId

Translation:

id | languageId | labelId

Label:

id

The problem: I'd like to create a title (translation) and associate it with the discount. Here's what I've tried:

$discount = new Discount;

/*create a new label*/

$labelKey = Label::max('key') + 1;
$label = new Label(array('key' => $labelKey));
$label->save();

/*create a new title (and associate it with the label)*/

$title = new Translation(array('phrase' => $input['title']));

$title->language()->associate($language);
$title->label()->associate($label);

$title->save();

$label->translations()->save($title);

$discount->save();

$discount->titles()->save($title);

Apparently, the $discount->titles()->save($title); part doesn't work. The title is only attached to the discount if I do it manually: $discount->titleLabelId = $label->id. Is there a way to do it using the ORM?