Filter over boundaries of 1:N connections

[Totktonada]

Consider empty list for a subrequest as a non-match situation.

[opomuc]

Basically customer wants such thing:

Let's assume we have a filter individuals(individual_customer_relation: {uid: $num}, last_name: $last_name) where individual_customer_relation is a 1:N connection to another space. Three situations are possible:

• last_name is specified
• num is specified
• both last_name and num are specified

We need to be able to filter resulting data in all of those 3 situations. When num is present -- only those individuals that have >= 1 of connected objects with uid == num must be returned. And so on