Question

这是我的模特：

class UploadedOrderImage(models.Model):
    order_image = models.OneToOneField(OrderImage)
    image_large = models.ImageField(upload_to=get_file_path_random, height_field='order_image.image_large_height', width_field='order_image.image_large_width')
    image_thumb = models.ImageField(upload_to=get_file_path_thumb, height_field='order_image.image_thumb_height', width_field='order_image.image_thumb_width')

其中order_image包含字段image_large_width，image_large_height，image_thumb_height和image_thumg_width。当我尝试上传图片时出现错误：

'UploadedOrderImage' has no attribute order_image.image_large_width

如何告诉django引用外键相关字段？

Answer 1

＆＃39;我不确定在这里使用外键属性。

但是这个怎么样？

class UploadedOrderImage(models.Model):
    order_image = models.OneToOneField(OrderImage)
    image_large = models.ImageField(upload_to=get_file_path_random)
    image_thumb = models.ImageField(upload_to=get_file_path_thumb)

    def save(self):             
       super(UploadedOrderImage, self).save()
       if self.image_large:
           image = Image.open(self.image_large)  
           size = (self.order_image.image_large_height,self.order_image.image_large_height)
           image = image.resize(size, Image.ANTIALIAS)
           image.save(self.image_large.path)
       if self.image_thumb:
           image = Image.open(self.image_thumb)  
           size = (self.order_image.image_thumb_height,self.order_image.image_thumb_height)
           image = image.resize(size, Image.ANTIALIAS)
           image.save(self.image_thumb.path)

Django ImageField如何将height_field设置为外键属性

1 个答案: