I have a route with multiple parameters and I want to define default values when it's empty.
I didn't find something similar on SO...

My Route (yml) :

```
app_product_show_range_tag:
path: 'list-range{range_id}-tag{tag_id}-{name_slug}/{page}'
methods: 'GET'
defaults:
    _controller: 'AppBundle:Product:showRangeTag'
    page: 1
    tag_id: 2
    range_id: null
requirements:
    name_slug: '([a-zA-Z0-9]+(?:-[a-zA-Z0-9]+)*)'
    tag_id: '\d+'
    range_id: '\d+'
    page: '\d+'

```

My Controller (begin ) :

```
/**
 * Show a range
 * @ParamConverter("productRange", options={
"mapping": {"range_id": "productRangeId", "locale": "locale"},
"repository_method": "findOneById",
"map_method_signature" = true
})
 *     @ParamConverter("productTag", options={
"mapping": {"tag_id": "productTagId", "locale": "locale"},
"repository_method": "findOneById",
"map_method_signature" = true
})
 */
public function showRangeTagAction(ProductRange $productRange = null, ProductTag $productTag = null, string $name_slug, int $page)
{ [...]

```

I don't understand what is wrong... I defined all default values, the controller too.

I did a quick demo at the url : <https://streamable.com/1paw>

Don't hesitate to ask more information !