Laravel Show Table Relation Only if Has Value

I have 2 tables Category & Transaction

in my model Category :

  public function transaction()
{
    return $this->hasMany('App\Transaction');
}

in my model Transaction :

  public function category()
{
    return $this->belongsTo('App\Category');
}

Architecture of my Transactions table :

id | category_id | qty 

Architecture of my Categories table :

id | name 

Now , how to display in view which i want to display only categories that have quantity(qty) value in Transactions table , i'm may have a lot of category in categories table , but not all categories has quantity in transactions table .

Thank you

note : if my question were stupid enough, forgive me , i already spend 1 week to study about this .

via Chebli Mohamed