在ImageField upload_to路径中获取用户名

Question

我希望在用户上传图像时在upload_to目录路径中包含用户名.这是我目前拥有的 -

#model
class Avatar(models.Model):
    avatar = models.ImageField(upload_to='images/%s' %(USERNAME) )
     user = models.ForeignKey(UserProfile)

#form
class ProfilePictureForm(ModelForm):
    class Meta:
        model = Avatar
        fields = ('avatar',)

如何让USERNAME模型能够设置upload_to路径？

Answer 1

upload_to可以是可调用的而不是字符串,在这种情况下,它将传递当前实例和文件名 - 请参阅文档.这样的事情应该有效(instance.user.user因为instance.user是UserProfile,所以instance.user.user是User).

def upload_to(instance, filename):
    return 'images/%s/%s' % (instance.user.user.username, filename)
class Avatar(models.Model):
    avatar = models.ImageField(upload_to=upload_to)
    user = models.ForeignKey(UserProfile)