Question

我安装了这个包https://github.com/dracos/django-date-extensions并使用了ApproximateDateField。一切正常，直到我试图将应用程序转换为使用南方。我跑的时候

manage.py convert_to_south journals

我收到以下错误

Creating migrations directory at '/Users/MYID/Projects/MyProjectDir/MyProject/apps/journals/migrations'...
Creating __init__.py in '/Users/MYID/Projects/MyProjectDir/MyProject/apps/journals/migrations'...
 ! Cannot freeze field 'journals.issue.publication_date'
 ! (this field has class django_date_extensions.fields.ApproximateDateField)

 ! South cannot introspect some fields; this is probably because they are custom
 ! fields. If they worked in 0.6 or below, this is because we have removed the
 ! models parser (it often broke things).
 ! To fix this, read http://south.aeracode.org/wiki/MyFieldsDontWork

我尝试将此添加到我使用该字段的模型文件中，但似乎没有效果

from south.modelsinspector import add_introspection_rules
....
add_introspection_rules([
(
        [ddx.ApproximateDateField],
        [],
        {},
    ),
], ['^south\.tests\.journals\.models\.ApproximateDateField'])

Answer 1

您是否从ApproximateDateField导入south.tests.journals.models？

在我看来，正则表达式与自定义Field类不匹配。您需要告诉South如何找到您自定义的字段，我假设您（我从未使用过django-date-extensions）从您导入：

django_date_extensions.fields

考虑到这一点，你应该改变这一行：

['^south\.tests\.journals\.models\.ApproximateDateField']

到此：

['^django_date_extensions\.fields\.ApproximateDateField']

南不使用Custom Field

1 个答案: