class Author(models.Model):
    salutation = models.CharField(max_length=10)
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=40)
    email = models.EmailField(blank=True, verbose_name='e-mail')
    class Admin:
        pass
    def __unicode__(self):
        return '%s %s' % (self.first_name, self.last_name)

def author_add (request):
    if request.method == 'POST':
        form = AuthorForm(request.POST)
        if form.is_valid():
            new_author = form.save()
            return HttpResponseRedirect('/data/ok/')
    else:
        form = AuthorForm()
    return render_to_response('author_form.html', {'form': form})


def author_edit (request, author_id):
    author = get_object_or_404(Author, pk=author_id)   
    if request.method == 'POST':
        form = AuthorForm(request.POST, instance=author)        
        if form.is_valid():
            form.save()
            return HttpResponseRedirect('/data/ok/')
    else:
        form = AuthorForm(instance=author)
    return render_to_response('author_form.html', {'form': form})

def author_add (request, author=None):
    if request.method == 'POST':
        form = AuthorForm(request.POST, instance=author)
        if form.is_valid():
            new_author = form.save()
            return HttpResponseRedirect('/data/ok/')
    else:
        form = AuthorForm()
    return render_to_response('author_form.html', {'form': form})

def author_edit (request, author_id):
    author = get_object_or_404(Author, pk=author_id)
    return author_add(request, author )

def author_add (request, author_id = None):
    print "author_add  %s"%author_id
    if author_id:
        author = get_object_or_404(Author, pk=author_id)
        if request.method == 'POST':
            form = AuthorForm(request.POST, instance=author)
            if form.is_valid():
                form.save()
                return HttpResponseRedirect('/data/ok/')
        else:
            form = AuthorForm(instance=author)
    else:
        if request.method == 'POST':
            form = AuthorForm(request.POST)
            if form.is_valid():
                new_author = form.save()
                return HttpResponseRedirect('/data/ok/')
        else:
            form = AuthorForm()
    return render_to_response('author_form.html', {'form': form})

def author_edit (request, author_id):
    return author_add(request, author_id)