Required With

The input under validation must be present and not empty only if any of the other specified fields are present.

The validation rule does not require a value to run.

Example

src/app/posts/controllers/create-post.ts

// ...
createPost.validation = {
  rules: {
    title: ["required"],
    "series.name": ["string"],
    "series.order": ["requiredWith:series.name"],
  },
};

It will fail ony and only if series.name is present and series.order is empty.