【发布时间】：2022-08-07 05:43:55
【问题描述】：
我正在尝试将变量作为关键字参数传递，如下所示：
@receiver(post_save, sender=BudgetTransaction)
def create_forecasted(sender, instance, created, **kwargs):
if instance.transaction_type == \"EC\":
return True
if created:
today = instance.next_date
last_day = date(today.year, 12, 31)
this_month = today.month
weeks_left = int((last_day - today).days / 7)
fortnights_left = int(weeks_left / 2)
months_left = 12 - this_month
if instance.frequency == \'weeks\':
create_range = weeks_left
elif instance.frequency == \'fort\':
create_range = fortnights_left
else:
create_range = months_left
loop = 1
for i in range(create_range):
if instance.frequency == \'fort\':
true_frequency = \'weeks\'
true_loop = loop * 2
elif instance.frequency == \'4week\':
true_frequency = \'weeks\'
true_loop = loop * 4
else:
true_frequency = instance.frequency
true_loop = loop
### PASSING VARIABLE HERE ###
next_month = today + relativedelta(**{true_frequency: true_loop})
date_string = next_month.strftime(\"%Y-%m-%d\")
BudgetTransaction.objects.bulk_create([BudgetTransaction(
owner=instance.owner,
transaction_amount=instance.transaction_amount,
transaction_name=instance.transaction_name,
transaction_type=instance.transaction_type,
next_date=date_string,
frequency=instance.frequency,
)])
loop += 1
这是一个 django 站点，当我通过该站点运行它时它不会出错。但是，当我运行测试时，我得到了这个错误：
Error
Traceback (most recent call last):
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\bf_app\\tests\\test_models.py\", line 26, in test_transaction_has_owner
transaction = TransactionFactory(owner=user)
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\factory\\base.py\", line 40, in __call__
return cls.create(**kwargs)
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\factory\\base.py\", line 528, in create
return cls._generate(enums.CREATE_STRATEGY, kwargs)
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\factory\\django.py\", line 117, in _generate
return super()._generate(strategy, params)
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\factory\\base.py\", line 465, in _generate
return step.build()
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\factory\\builder.py\", line 262, in build
instance = self.factory_meta.instantiate(
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\factory\\base.py\", line 317, in instantiate
return self.factory._create(model, *args, **kwargs)
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\factory\\django.py\", line 166, in _create
return manager.create(*args, **kwargs)
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\django\\db\\models\\manager.py\", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\django\\db\\models\\query.py\", line 514, in create
obj.save(force_insert=True, using=self.db)
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\django\\db\\models\\base.py\", line 806, in save
self.save_base(
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\django\\db\\models\\base.py\", line 872, in save_base
post_save.send(
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\django\\dispatch\\dispatcher.py\", line 176, in send
return [
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\venv\\lib\\site-packages\\django\\dispatch\\dispatcher.py\", line 177, in <listcomp>
(receiver, receiver(signal=self, sender=sender, **named))
File \"C:\\Users\\Mitchell\\PycharmProjects\\BudgieFinance_TW\\bf_app\\models.py\", line 82, in create_forecasted
next_month = next_date + relativedelta(**{true_frequency: true_loop})
TypeError: keywords must be strings
我不完全确定如何解决这个问题，因为我以前从未将关键字作为变量传递，所以我不太熟悉这个过程。这发生在接收器对象上。
谢谢
-
您可以从测试文件中扩展您的示例吗？问题不在您发布的代码中
-
添加了额外的代码
标签： python python-3.x django receiver