What is this for : form[0][0][1] = TD(my_select)
??? Default choice to be charged into the dropdown field?? There is a option for default choice... And there is a syntax to be used into controller to set default value when needed if it is not to be set everywhere the model is used. db.tablegroup.parent.requires = IS_NULL_OR(IS_IN_DB(db, 'tablegroup.id', '%(name)s', zero=None)) # in your controller before call crud.create for example For default choice see this section in the book : http://web2py.com/book/default/chapter/06?search=default#Record-Representation Beside field constructor tag There is also keepvalue that alow you to prepopulate form with value of your choice. Hope it help. Richard On Sun, Mar 6, 2011 at 4:59 AM, toan75 <toa...@gmail.com> wrote: > Hi all, > > Please help me with the problem of dropdown selection. > It work fin by default: select blank option in the drop down, it update > value of field reference = None > But i need change drop down list: form[0][0][1] = TD(my_select) > Now, it update value = 0 (not None) and I can't update: db( > db.tablegroup.id==form.vars.id).update(field=None) > How i use None instead 0 ? > > MODEL: > > db.define_table('tablegroup', > Field('parent', 'reference tablegroup', requires = > IS_NULL_OR(IS_IN_DB(db, 'tablegroup.id', '%(name)s', zero=None))), > Field('name', unique=True), > migrate=True) > > CONTROL: > > def create(): > form=crud.create(db.tablegroup) > form[0][0][1] = TD(my_select) > if form.accepts(request.vars, session): pass > return dict(form=form) > >
