不显示在Django中手动保存到另一个模型的路径的图像

Question

我有两个ImageField模型。我正在使用sorl-thumbnail生成缩略图。第一个模型有一个绑定到它的表单，而第二个模型在保存时从第一个模型中填充它的ImageField。

models.py

#the first model
class NewImage(models.Model):
    thumbnail = models.ImageField(upload_to='photos')
    time_created = models.DateTimeField()
#second
class Users(models.Model):
    name = models.CharField(max_length=100)
    address = models.CharField(max_length=200)
    thumbnail = models.ImageField(upload_to='photos')
    time_created = models.DateTimeField()

forms.py

class ImageForm(forms.ModelForm):
  class Meta:
    model = NewImage
    fields = {'thumbnail'}

views.py

def saveImage(request):
    if request.method == 'POST':
      user = Users.objects.get(id = 1)
      imageForm = ImageForm(request.POST, request.FILES or None)
        if imageForm.is_valid():
            upload_image = imageForm.save(commit=False)
            upload_image.time_created = timezone.now()
            upload_image.save()
            #save image path to user who uploaded it.
            user.thumbnail = upload_image.thumbnail
            user.save()

如果我将这些传递给我的模板：image = NewImage.objects.get(id = 1)和user = Users.objects.get(id = 1)。

这显示了我的形象：

{% thumbnail image.thumbnail "200x100" crop="center" as im %}
    <img src="..{{ im.url }}" width="{{ im.width }}" height="{{ im.height }}">
{% endthumbnail %}

但它只显示一个方框：

{% thumbnail user.thumbnail "200x100" crop="center" as im %}
    <img src="..{{ im.url }}" width="{{ im.width }}" height="{{ im.height }}">
{% endthumbnail %}

这两个图像都有一个链接到在缓存文件夹中创建的图像sorl-thumbnail。

为什么会发生这种情况，如何显示我的user.thumbnail？

Answer 1

试试这个：

user.thumbnail = upload_image.thumbnail.name
user.save()

还有一件事：

不执行upload_image.time_created = timezone.now()，您可以更改模型以包含auto_now_add=True，这将自动将time_created保存到实际创建的时间。就像这样：

class NewImage(models.Model):
    thumbnail = models.ImageField(upload_to='photos')
    time_created = models.DateTimeField(auto_now_add=True)

希望能帮上忙。