def insert_countries(self):
if self.data_delete:
Country.objects.all().delete()
self.stdout.write('delete data: country. \n')
else:
if Country.objects.all().count() == 0:
country_helper = CountryHelper()
country_helper.insert_data()
self.stdout.write('Successfully inserted data: country. \n')
else:
self.stdout.write('can not insert the data: country. \n')
