/**
  * Decrement has item count
  *
  * @param CategoryEntity $category category object
  * @param int            $amount   decrease value
  * @return int affecting statement
  */
 public function decrement(CategoryEntity $category, $amount = 1)
 {
     return $this->conn->table($this->table)->where('id', $category->id)->decrement('count', $amount);
 }