Hello.

I have a one node type "Location", witch has link to itself (node reference). Fro example, I have a location "Spain", and location "Barselona" witch link to Spain with node reference field.

I want to create an exposed filter in views block with this field. Filter is displaying in the block, but its allowed value consists all nodes, first and second hierarhy level. How I can limit this allowed values with nodes only first level?

Thank you.