使用WTForms的动态选择字段未更新

创建表单对象时，应初始化表单选择：

class UserForm(Form):    username = StringField('Username', validators=[DataRequired()])    password = PasswordField('Password', validators=[DataRequired()])    job = SelectField(        'Job',        validators=[DataRequired()]    )    def __init__(self, *args, **kwargs):        super(UserForm, self).__init__(*args, **kwargs)        self.job.choices = [(a.id, a.name) for a in Job.query.order_by(Job.name)]

或在视图中：

form = UserForm()form.job.choices = [(a.id, a.name) for a in Job.query.order_by(Job.name)]