I'm having problems with wtforms selectfields when i use a POST with Flask
You need to set your choices before you call validate_on_submit as form.validate will attempt to validate the provided value (if any) against the list of choices (which is None before you set choices):
form = PostForm()form.hometest.choices = [(h.key.id(), h.homename) for h in Home.query()]if form.validate_on_submit(): # form is valid, continue
You should provide choices=[...] argument, like
wtf.SelectField(u'Home Name List', choices=[(1, 'Label 1'), (2, 'Label 2')], coerce=int, validators=[validators.optional()])