[GraphQL] Introducing @cascade in the GraphQL API?

[hackintoshrao]

What you wanted to do

This is briefed in https://discuss.dgraph.io/t/graphql-nested-filter/5997

What you actually did

Try to filter based on a deeper feature in the GraphQL query.

Why that wasn't great, with examples

I need to write custom logic with GraphQL+- to achieve this, the link here, discussed the issue in detail.

Any external references to support your case

https://discuss.dgraph.io/t/graphql-nested-filter/5997