complex form

[mu]

Hi all,
   I have a question about complex form.
   There are my models:

     class Country(models.Model):
             name = models.CharField(max_length=30)
                
         class Author(models.Model):
         name = models.CharField(max_length=30)
         age = models.IntegerField()
         email = models.EmailField()
                 country = models.ForeignKey(Country)
                
         class Book(models.Model):
         title = models.CharField(max_length=100)
         author = models.ForeignKey(Author)
         price = models.FloatField()
         publication_date = models.DateField()
                
   I want to display a page like this:
         display a author input form on top of the page, display a book input
form on bottom of the page.
        
   Validations:
         When the author's name is 'mbs', the book's price must greater than 12.
         When the author's country is 'japan', the book's publication_date
must be '2010-6-30'
        
   Now what i do is:
     a form holds all fields of Author and Book, but i found it is
redundant when  set values
        
   Is there a convenient and Pythonnic way to achieve this?

   Thanks

-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To post to this group, send email to django-us...@googlegroups.com.
To unsubscribe from this group, send email to 
django-users+unsubscr...@googlegroups.com.
For more options, visit this group at 
http://groups.google.com/group/django-users?hl=en.