python - 使用django上传文件时如何创建一些年/月/日路径

Question

我有这样的模型:

class Obs(models.Model):
    date = models.DateTimeField(auto_now_add=False, verbose_name='Date')
    description = models.TextField(verbose_name='Description')
    content = models.FileField(verbose_name='File', upload_to='%Y/%m/%d')
    category = models.ForeignKey(ObsType, related_name='Type', verbose_name='type')
    user = models.ForeignKey(User, verbose_name='User')

我需要将“upload_to”路径设置为“日期”字段，但此日期不是当前日期。我应该怎么做？

更新

我用这样的函数解决它:

def get_upload_to(instance, filename):
    date = unicode(instance)
    date = date.split()[0]  # to delete Time
    date = date.split('-')
    return '%s/%s/%s/%s' % (date[0], date[1], date[2], filename)

在我的例子中，日期表示为 2014-01-04。如果是 2014/01/04 就会出错。

Answer 1

您应该使用自定义方法来指定 upload_to 路径，如下所示:

def get_obs_upload_path(instance, filename):
    my_custom_date = datetime.now()
    return '%s/%s' % (my_custom_date, filename)

class Obs(models.Model):
    date = models.DateTimeField(auto_now_add=False, verbose_name='Date')
    description = models.TextField(verbose_name='Description')
    content = models.FileField(verbose_name='File', upload_to=get_obs_upload_path)
    category = models.ForeignKey(ObsType, related_name='Type', verbose_name='type')
    user = models.ForeignKey(User, verbose_name='User')