+ form_data['children'] = 1.1
+ self.check_post(form_data, '/process?id=', 400)
+ form_data['children'] = 'a'
+ self.check_post(form_data, '/process?id=', 400)
+ form_data['children'] = [1.2]
+ self.check_post(form_data, '/process?id=', 400)
+ form_data['children'] = ['b']
+ self.check_post(form_data, '/process?id=', 400)
+ form_data['children'] = [2]
+ self.check_post(form_data, '/process?id=1', 400)