python - WTForm "OR"条件验证器？ (电子邮件或电话)

Question

class ContactForm(Form):
  name = StringField('Name',
                     validators=[DataRequired(), Length(max=255)])
  email = StringField('Email',
                      validators=[Optional(), Email(), Length(max=255)])
  phone = StringField('Phone number',
                      validators=[Optional(), NumberRange(min=8, max=14)])
  comment = TextAreaField(u'Comment',
                          validators=[DataRequired()])

有没有办法指定一个验证器，使得 email 或 phone 是必需的？

Answer 1

您可以在表单上创建一个validate 方法并进行一些手动检查。像这样的东西可能会让你开始。

class MyForm(Form):
    name = StringField('Name',
                 validators=[DataRequired(), Length(max=255)])
    email = StringField('Email',
                      validators=[Optional(), Email(), Length(max=255)])
    phone = StringField('Phone number',
                      validators=[Optional(), NumberRange(min=8, max=14)])
    comment = TextAreaField(u'Comment',
                          validators=[DataRequired()])
    def validate(self):
        valid = True
        if not Form.validate(self):
            valid = False
        if not self.email and not self.phone:
            self.email.errors.append("Email or phone required")
            valid = False
        else:
            return valid