I'm trying to use the new ability to pass a callable to "upload_to" in
fieldfields. I'm having problems with the object not being saved
before the callable is called.
Model:
def file_path(instance, filename):
return "uploads/files/%s/%s/%s_%s%s" % (
slugify(instance.article.author.lastname
+"_"+instance.article.author.firstname),
slugify(instance.article.title),
instance.get_type_display(),
instance.number,
os.path.splitext(filename)[1])
class File(models.Model):
article= models.ForeignKey(Article)
file= models.FileField(upload_to=file_path)
type= models.IntegerField(choices=choices((0,"Text"),(1,"Figure"),
(2,"Table")))
number= models.IntegerField()
File is being edited inline in "Article". This should create a path
like
"uploads/files/peter_parker/webs_i_have_known/Figure_1.jpg",
however, what I actually get is:
"uploads/files/parker_peter/webs_i_have_known/None_None.jpg".
So "instance.get_type_display()" and "instance.number" are returning
"None".
If I change the file and save it again the name is assigned
correctly.
This is clearly because the object has not been saved the first time
when the filepath is calculated. How to fix this? Is there a way to
save the rest of the object before calling "file_path"?
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