Redmine

Hey guys! I'm new here. Our company is using Redmine (awesome project btw!), and I'm utilizing the Redmine API to transfer data from Redmine (projects, memberships, time entries) to our payroll system.

My question is: since Redmine has a feature that allows unlimited nesting of projects, how can I determine (through the Projects API) if the project is not a parent and has no children? Our system needs to automatically create equivalent projects of the Redmine but no more nesting involved (all projects in one level).

Thanks for reading this! Any help is appreciated. :)