On Jan 7, 7:47 am, jeffhg58 <jeffh...@comcast.net> wrote:
> I have a 2 forms. One to add a new author and then another form for
> Articles which has a drop down list to reference the authors. The
> behavior I am seeing is that when I add a new author and then go to
> the New Article form which references the author it does not display
> the new record. Also, I put in some print statements in the New
> Article form class and those statements are only executed when I go to
> my home page.
>
> Here are my code snippets
>
> def welcome(request):
>
> print 'in welcome'
>
> if request.GET:
> if request.GET.has_key( 'newarticle'):
>
> print 'going to new article'
>
> return HttpResponseRedirect( '/melsite/newarticle')
> if request.GET.has_key( 'newauthor'):
> print 'going to new author'
>
> return HttpResponseRedirect( '/melsite/newauthor')
> else:
>
> print 'retrieving articles'
>
> articles = Article.objects.filter
> (type_index__type='Poem').order_by('title')
>
> return render_to_response('stories/welcome.html', {'title':
> 'Poems', 'articles': articles})
>
> def newarticle( request):
>
> print 'in new article request'
> from storyforms import NewArticle
>
> if request.method == 'POST':
> print 'in new article post'
> new_data = request.POST.copy()
> articleform = NewArticle(new_data)
> if form.is_valid():
> form.save( new_data)
> articles = Article.objects.filter
> (type_index__type='Poem').order_by('title')
>
> return render_to_response('stories/welcome.html',
> {'title': 'Poems', 'articles': articles})
> else:
> print 'in setting up new article'
> #from storyforms import NewArticle
> articleform = NewArticle()
> print 'after setting up new article'
> print 'rendering article'
> return render_to_response('stories/add_story.html', {'form':
> articleform})
>
> class NewArticle( forms.Form):
>
> articletypelist=[]
> authorlist = []
>
> print 'in new article class'
>
> articletypes = ArticleType.objects.all().order_by( 'type')
> articletypelist.append( selecttuple)
> for articletype in articletypes:
> choicestr = "choice%s" % str( articletype.id)
> typetuple = choicestr, articletype.type
> articletypelist.append( typetuple)
> authors = Author.objects.all().order_by( 'last_name')
> print 'authors in new article are ', authors
> authorlist.append( selecttuple)
> for author in authors:
> choicestr = "choice%s" % str( author.id)
> authorname = author.first_name + ' ' + author.last_name
> authortuple = choicestr, authorname
> authorlist.append( authortuple)
>
> ArticleType = forms.ChoiceField( choices=articletypelist)
> Author = forms.ChoiceField( choices=authorlist)
> Title = forms.CharField()
> Content = forms.CharField( widget=forms.Textarea)
> print 'end of new article def'
>
> Thanks,
> Jeff
As Karen says, logic in the class declaration is only executed once,
when the form is first imported. Authorlist and articletypelist are
much better implemented as class methods on the relevant models:
class Author(models.Model):
...
@classmethod
def get_authorlist(cls):
return [('choice%s' % a.id, '%s %s' % (a.first_name,
a.last_name))
for a in cls.objects.all().order_by('last_name')]
Then in your view or template you can do Author.get_authorlist() to
return the up-to-date list.
However, a much better solution is to use ModelChoiceField for the
Articletype and Author fields. These populate the list dynamically
from a queryset:
class NewArticle(forms.Form):
...
Author = forms.ModelChoiceField(queryset=Author.objects.order_by
('last_name'))
--
DR.
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