Loading data to ToscaWidgets2 forms

[Mikhail]

Hello again!

Finally I have time to port my project to new version of TurboGears. I was able to solve most of the issues but now I need your help:

I can't load data to TW2 form. Here are some code:

widgets/news.py fragment (form):

class NewsEditForm(TableForm):
    title_label = Label(text=u'Изменить новость')
    tf_title = TextField(label=u'Заголовок', validator=NotEmpty, size=50)
    tf_url = TextField(label=u'Ссылка', validator=URL, size=50)
    tf_text = TextArea(label=u'Текст новости', validator=NotEmpty, rows=10, cols=50)
    news_id = HiddenField('news_id')

    submit = SubmitButton(value=u"Изменить")
    action = '/manage/saveNews'

   
manage.py Controller fragment:

class ManageController(BaseController):
...
    @expose('cafealpha.templates.manage_news')
    def news(self, news_id='', *args, **kw):
        if not request.identity:   #if not authorized then redirect to /
            redirect('/')

        news = DBSession.query(News).filter_by(id=news_id).one()
        news_form = NewsEditForm()
        news_form.tf_title.value = news.title

        return dict(pagename=u'Новости', form=news_form)

manage_news.xhtml fragment:

${form.display()}

Error I'm getting is:

  File "/home/uni/projects/cafealpha-tg23/venv/cafealpha/cafealpha/controllers/manage.py", line 46, in news
    news_form.tf_title.value = news.title
AttributeError: type object 'NewsEditForm_d' has no attribute 'tf_title'

It seems I'm misssing something obvious so pleas point me.

My Python is rusty so feel free to laugh :)

P.S. I was able to load data to form using this code in template:

${form.display(value=dict(tf_url=news_url))}

and passing news_url with return dict() from Controller. But I just think this is not the best way. Or is it?

[Alessandro Molina]

You actually did right in your second experiment.

The way you are supposed to do it is by passing the `value` to the form, not trying to set attributes of single fields.

See https://tw2core.readthedocs.io/en/latest/widget/#widget-value

So in practice the right way would be to do:

form(value=dict(tf_url=X)).display()

or

form.display(value=dict(tf_url=X))

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