I'm trying to filter a numeric value by values ​​greater, lesser or equal to the one given in input.

So far I have managed to filter individually or at most by >= or <=

```
 ->andFilterWhere(['<=', 'production_order.qnt', $this->qnt])

```

but I can't find a solution to filter by writing in the input "<500"
or "> 500" because in the rules I set this value ( qnt ) as integer.

```
 public function rules()
{
    return [
        [['product_routing_id', 'qnt', 'qnt_worked', 'production_status_id', 'production_order_id', 'acceptance_order_id', 'customer_id', 'product_id', 'casting_id', 'trash'], 'integer'],
}

```

Do i need a custom filter for it?
Any ideas?
Thanks