On 12/22/07, Yatla <[EMAIL PROTECTED]> wrote:
>
> I need to initialize a selection in a M2M field of the Document
> ModelForm during the first GET of a form that creates a new Document -
> classes and view as follows:
>
> class DocumentForm(forms.ModelForm):
> class Meta:
> model = Document
>
> class Document(models.Model):
> .......
> categories = models.ManyToManyField(Category)
>
> view function:
> def create(request, category_name, template='edit2.html', params={}):
> category = get_object_or_404(Category, name=category_name)
> new_doc = Document(author=request.user, pub_date=datetime.now())
> if request.method == 'POST':
> form = DocumentForm(request.POST, instance=new_doc)
> if form.is_valid():
> .....
> else:
> form = DocumentForm(instance=new_doc) # todo: figure out how
> to initialize categories
> params['form'] = form
> return render_to_response(template, params,
> RequestContext(request))
Are you trying to assign all new docs to an existing Category object
then? I think if you used the 'initial' argument in in the form
constructor it would work. Something like:
initial_data={'categories': [category.id]}
form = DocumentForm(request.POST, initial=initial_data, instance=new_doc)
Joseph
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