Can not use "_" inside validation rule name


#1

Hi
It seems that I can not use _ character in validation rule name. framework can’t find it when I’m going to use it. can anyone help me how can I fix it

Validator.extend('exists_in_shop', ExistsInShopFn)
const rules = {
    id: 'required|exists_in_shop:products,id', // not available here
};