Custom implicit route child model resolution

[marvin-wtt]

I need to implement a custom implicit model resolution to allow support for localized slugs. To accomplish that I simply override the resolveRouteBinding function of the model.

framework/src/Illuminate/Database/Eloquent/Model.php

Lines 1871 to 1881 in e4b54ba

	/**
	* Retrieve the model for a bound value.
	*
	* @param mixed $value
	* @param string|null $field
	* @return \Illuminate\Database\Eloquent\Model|null
	*/
	public function resolveRouteBinding($value, $field = null)
	{
	return $this->where($field ?? $this->getRouteKeyName(), $value)->first();
	}

This works great as long as long as the model is not in a relationship or it is the parent of it.
If the model is a child in a relationship, resolveChildRouteBindingQuery of the parent model is called instead and the model cannot be resolved.

framework/src/Illuminate/Database/Eloquent/Model.php

Lines 1921 to 1941 in e4b54ba

	/**
	* Retrieve the child model query for a bound value.
	*
	* @param string $childType
	* @param mixed $value
	* @param string|null $field
	* @return \Illuminate\Database\Eloquent\Relations\Relation
	*/
	protected function resolveChildRouteBindingQuery($childType, $value, $field)
	{
	$relationship = $this->{Str::plural(Str::camel($childType))}();
	$field = $field ?: $relationship->getRelated()->getRouteKeyName();
	if ($relationship instanceof HasManyThrough ||
	$relationship instanceof BelongsToMany) {
	return $relationship->where($relationship->getRelated()->getTable().'.'.$field, $value);
	}
	return $relationship->where($field, $value);
	}

Does anyone have an idea on how to solve this problem?
One idea I had was add resolveRouteBindingQuery to the model and call it from resolveChildRouteBindingQuery but I was unable to retrieve the child model from the relationship.

Thanks in advance!