id
id_supplier
id_store

id

id

public function supplier() {
    return $this->belongsTo('AppSupplier', 'id_supplier');
}

public function repairs() {
    return $this->hasMany('AppRepair', 'id_supplier');
}

public function repairs() {
    return $this->hasMany('AppRepair', 'id_store');
}

public function suppliers() {
    return $this->hasManyThrough('AppSupplier', 'AppRepair', 'id_supplier', '<NO IDEIA WHAT'S HERE>');
}