Model relations

[cdarken]

I was having a look at the relation between Inventory and Metric models.
I noticed this:

public function metric()
    {
        return $this->hasOne('Stevebauman\Inventory\Models\Metric', 'id', 'metric_id');
    }

And in the Metric class:

public function items()
    {
        return $this->hasMany('Stevebauman\Inventory\Models\Inventory', 'metric_id', 'id');
    }

AFAIK, reading the docs, the hasOne relation should be used for one-to-one relations, the inverse of hasMany being belongsTo. Am I wrong? Did you have something else in mind when using hasOne ?