(fields.E005)“选择”必须是包含（实际值、人类可读名称）元组的可迭代

Question

我在下面创建了这个模型，几乎整个星期我都工作得很好。关闭服务器并再次重新启动它，它向我抛出了 (fields.E005) 'choices' must be an iterable contains (actual value, human url url name) tuples 错误。完全使用了django文档，仍然没有解决方案。

`类检查（模型.模型）：

RESULT_CHOICES = [
    ("PR"  "Passed"),
    ("PR"  "Passed with minor Defects"),
    ("PR"  "Passed with major Defects"),
    ("FR"  "Failed due to minor Defects"),
    ("FR"  "Failed due to major Defects"),
    ("FR"  "Failed"),
]

vin_number = models.ForeignKey(Vin, on_delete=models.CASCADE, related_name='inspections')
inspection_number = models.CharField(max_length=20)
year = models.CharField(max_length=4)
inspection_result = models.CharField(max_length=30, 
choices=RESULT_CHOICES)
ag_rating = models.CharField(max_length=30)
inspection_date = models.DateField()
link_to_results = models.CharField(max_length=200)

def __str__(self):
    return self.inspection_number`

我尝试：

YEAR_IN_SCHOOL_CHOICES = { "FR": "Freshman", "SO": "Sophomore", "JR": "Junior", "SR": "Senior", "GR": "Graduate", }

但还是没用。甚至可以由于错误而迁移

Answer 1

您创建了一个字符串列表，而不是一个二元组字符串列表。您应该在

'PR'

:

之后添加逗号

RESULT_CHOICES = [
    ('PR', 'Passed'),
    ('PR', 'Passed with minor Defects'),
    ('PR', 'Passed with major Defects'),
    ('FR', 'Failed due to minor Defects'),
    ('FR', 'Failed due to major Defects'),
    ('FR', 'Failed'),
]

但这仍然行不通：键应该是唯一的，否则，一旦存储在数据库中，它就无法检索确切的选择。

所以类似：

RESULT_CHOICES = [
    ('PR', 'Passed'),
    ('PRA', 'Passed with minor Defects'),
    ('PRI', 'Passed with major Defects'),
    ('FRA', 'Failed due to minor Defects'),
    ('FRI', 'Failed due to major Defects'),
    ('FR', 'Failed'),
]