I'm running into an issue where the Parent - Child relationship is working for some documents ONLY (using the has_parent and has_child queries).
Say there is a 'Brand' and 'Product' documents and brand is a parent document for product and product has ' _parent ' mapped.
How do I ensure / what should I check to see if the two documents are properly established with Parent - Child relationship?
I would appreciate any pointers / help. TIA.