How do I generate dynamic fields in WTForms

Question

I am trying to generate a form in WTForms that has dynamic fields according to this documentation http://wtforms.simplecodes.com/docs/1.0.2/specific_problems.html#dynamic-fo

Answer 1

WTForms Documentation : class wtforms.fields.SelectField

Select fields with dynamic choice values:

class UserDetails(Form):
    group_id = SelectField(u'Group', coerce=int)

def edit_user(request, id):
    user = User.query.get(id)
    form = UserDetails(request.POST, obj=user)
    form.group_id.choices = [(g.id, g.name) for g in Group.query.order_by('name')]