Django 名称错误 : name 'bPath' is not defined

Question

我在 Django 1.7 上运行，当我运行 python manage.py migrate 时出现以下错误

      File "/home/ymorin007/workspace/sites/jantiyes.com/src/deeds/migrations/0006_auto_20141204_1631.py", line 9, in <module>
    class Migration(migrations.Migration):
  File "/home/ymorin007/workspace/sites/jantiyes.com/src/deeds/migrations/0006_auto_20141204_1631.py", line 19, in Migration
    field=models.ImageField(storage=django.core.files.storage.FileSystemStorage(location=bPath('/home/ymorin007/workspace/sites/jantiyes.com/src/media')), max_length=255, null=True, upload_to=deeds.models.picture_name, blank=True),
NameError: name 'bPath' is not defined

这是我的事迹/models.py

from jantiyes.settings.base import MEDIA_ROOT

upload_storage = FileSystemStorage(location=MEDIA_ROOT)

def picture_name(self, filename):

    ext = filename.split('.')[-1]
    deedname = re.sub('[ ]', '-', self.text.lower())
    filename = "DEED-%s-%s.%s" % (self.id, deedname, ext)

    url = "%s" % filename

    return url


class Deed(TimeStampedModel):

    picture = models.ImageField(upload_to=picture_name, null=True, blank=True, storage=upload_storage, max_length=255)
    text = models.CharField(max_length=500)
    when = models.DateField(unique=True)

我的媒体声明:

BASE_DIR = Path(__file__).ancestor(3)
MEDIA_ROOT = BASE_DIR.child("media")

Answer 1

如果没有 jantiyes.settings.base.MEDIA_ROOT 的确切定义，很难说清楚。但我想这是一个不是 deconstructible 的类( bPath )的实例那是一个subclass of unicode .因此迁移作者假设它不需要任何导入，只需 repr结果是 bPath('/home/ymorin007/workspace/sites/jantiyes.com/src/media') 的值.

你有两个选择:

确保 jantiyes.settings.base.MEDIA_ROOT被定义为字符串，因此由迁移编写器正确处理。例如MEDIA_ROOT = '/home/ymorin007/workspace/sites/jantiyes.com/src/media'在您的 jantiyes.settings.base模块文件。

确保 bPath类可通过定义 deconstruct 来解构方法将导入路径返回给自身。