小编dav*_*ang的帖子

如何在Django 1.8+上重新运行数据迁移？如果相关,我的迁移编号为0011_my_data_migration.py,是最新的迁移.

这是我的模特.

Poll(models.Model):
   title = models.CharField(max_length=1024)
   MY_VAR = ['my_class_level_attribute'] # I want to access this

这是我的数据迁移:

def my_func(apps, schema_editor):
    Poll = apps.get_model('my_app', 'Poll')
    print Poll.MY_VAR


class Migration(migrations.Migration):

    dependencies = [
        ('webmerge', '0012_previous_migration'),
    ]

    operations = [
        migrations.RunPython(my_func)
    ]

该行print Poll.MY_VAR给出了属性错误.我认为问题可能在于如何get_model在数据迁移中执行,因为以下行在Django shell中成功:

In [2]: from django.apps import apps
In [3]: Poll = apps.get_model('my_app', 'Poll')
In [4]: Poll.MY_VAR
Out[4]:  ['my_class_level_attribute']