Query examples

[mauphung]

I can get a category with its products and parents like this:
$query = '
{ category (id:'.$id.') {
category_id , name , products_count ,
categories { category_id , name } ,
products { product_id name, description, image, price, special }
} }';
But I cannot get a category with a filter as defined in schema.qgl
type CategoryType {
category_id:ID
name:String
...
filters:[CategoryFilterGroupType]
}

type CategoryFilterGroupType {
filter_group_id:ID
name:String
filter:[CategoryFilterDataType]
}

type CategoryFilterDataType {
filter_id:ID
name:String
}
Please help me with some examples on query with filters. For example query to get category filter by name and/or others.
Thank you very much.