Django：在“ migrate”命令期间出现“无效的默认值”

Question

There is a simple model

class Baz(models.Model):
  FOO = ('foo', 'Foo')
  BAR = ('bar', 'Bar')
  FOO_BAR = (FOO, BAR)

  foo_bar = models.CharField(max_length=5, default=FOO, choices=FOO_BAR)

After making migrations via python manage.py makemigrations , when trying to migrate, getting error:

django.db.utils.OperationalError: (1067, "Invalid default value for 'foo_bar'")

Tried to put ('foo', 'Foo') explicitly with no result. Tried to use FOO_BAR[0] - same error.

Any ideas?

Answer 1

您不应将变量指定为默认值，而应提供将要保存的实际值：

foo_bar = models.CharField(max_length=5, default='foo', choices=FOO_BAR)