class CmAdmin::ResourceController

def get_nested_table_fields(fields)
  nested_table_fields = []
  fields.each do |field|
    if field.class == CmAdmin::Models::Row
      nested_table_fields += field.sections.map(&:nested_table_fields).flatten
    elsif field.class == CmAdmin::Models::Section
      nested_table_fields += field.nested_table_fields.flatten
    end
  end
  nested_table_fields.flatten
end