Question

我尝试扩展已有的模型，因此我添加了缩略图＆＃39;进去。不幸的是，与此相关的功能无法识别，django控制台给了我：

thumbnail = models.ImageField(upload_to=_get_upload_image, blank=True, null=True)
NameError: name '_get_upload_image' is not defined

有人可以帮我解决这个问题吗？

Django 1.6.5 models.py（短版）

class Feed(models.Model):
    link = models.CharField(blank=True, max_length=450)
    url = models.CharField(blank=True, max_length=450)
    title = models.CharField(blank=True, null=True, max_length=250)
    category = models.ForeignKey(Category, blank=True, null=True)
    user = models.ForeignKey(User, blank=True, null=True)
    last_update = models.DateField(blank=True, null=True, editable=False)
    country = models.ForeignKey(Country, blank=True, null=True)
    thumbnail = models.ImageField(upload_to=_get_upload_image, blank=True, null=True)

    class Meta:
        unique_together = (
            ("url", "user"),
        )

    def _get_upload_image(instance, filename):
        return "images/%s_%S" % (str(time()).replace('.','_'), filename)

Answer 1

我通过将函数放在类

之上来解决这个问题

class Feed(models.Model):

    def _get_upload_image(instance, filename):
        return "images/%s_%S" % (str(time()).replace('.','_'), filename)

    link = models.CharField(blank=True, max_length=450)
    url = models.CharField(blank=True, max_length=450)
    title = models.CharField(blank=True, null=True, max_length=250)
    category = models.ForeignKey(Category, blank=True, null=True)
    user = models.ForeignKey(User, blank=True, null=True)
    last_update = models.DateField(blank=True, null=True, editable=False)
    country = models.ForeignKey(Country, blank=True, null=True)
    thumbnail = models.ImageField(upload_to=_get_upload_image, blank=True, null=True)

模型中的函数无法识别

1 个答案: