将参数传递给ForeignKey类

Question

I am using stdimage to auto resize my images, I have something like that :

class Image(models.Model):
    image = stdimage.StdImageField(upload_to="images/uploads/", size=(width, height))


class Nevermind(models.Model):
    w, h = 300, 150
    image = models.ForeignKey(Image)

class Nevermind2(models.Model):
    w, h = 100, 100
    image = models.ForeignKey(Image)

So I would like pass width and heigth as arguments to the Image class.

Thanks

Answer 1

I'm not sure exactly what your goal is, but you could try using model methods to define extra paramenters with the models.

#model
class Nevermind2(models.Model):
    image = models.ForeignKey(image)

    def size(self):
        w,h = 100,100
        return w, h

#example use
>>> a = Nevermind2.objects.get(pk=1)
>>> a.size()
(100,100)
>>> w,h = a.size()
>>> w
100
>>> h
100