sample.rb

if(params[:user][:own_organizations_attributes])
  params[:user][:own_organizations_attributes][:org_phone_number] = params[:user][:contact_number].to_i
  resource.own_organizations_attributes = params[:user][:own_organizations_attributes]
  resource.time_zone = params[:user][:time_zone]
end

#role membership after create
if self.organization.contact_number.nil?
  self.organization.update_attributes(:contact_number => self.user.contact_number)
end