Django: Access primary key in models.filefield(upload_to) location

Question

I\'d like to save my files using the primary key of the entry.

Here is my code:

def get_nzb_filename(instance, filename):
    if not instance.pk:
            


        

Answer 1

Context

Had the same issue. Solved it attributing an id to the current object by saving the object first.

Method

1. create a custom upload_to function
2. detect if object has pk
3. if not, save instance first, retrieve the pk and assign it to the object
4. generate your path with that

Sample working code :

class Image(models.Model):
    def upload_path(self, filename):
        if not self.pk:
            i = Image.objects.create()
            self.id = self.pk = i.id
        return "my/path/%s" % str(self.id)
    file = models.ImageField(upload_to=upload_path)