DateField'str'对象没有属性'year'

在测试中,您将日期设置为字符串:

mcr = MonthControlRecord(employee=employee, first_day_of_month="2015-12-01")

尝试将其设置为日期:

your_date = datetime.date(2015, 12, 1)
mcr = MonthControlRecord(employee=employee, first_day_of_month=your_date)