验证表单后，wtforms会引发验证错误 [英] wtforms raise a validation error after the form is validated

问题描述

我有一个收集信用卡信息的注册表.工作流程如下:

I have a registration form that collects credit card info. The workflow is as follows:

• 用户通过条带输入注册数据和卡数据.
• 该表格已针对注册数据进行了验证.
• 如果该表格有效，则将处理付款.
• 如果付款成功，那么一切都很好，用户已注册并继续前进.
• 如果付款失败，我希望能够在表单的隐藏字段上引发验证错误.有可能吗?

这是一个表单提交代码:

Here's a the form submission code:

def register():
form = RegistrationForm()
if form.validate_on_submit():

    user = User(
        [...]
    )

    db.session.add(user)

    #Charge
    amount = 10000

    customer = stripe.Customer.create(
        email=job.company_email,
        card=request.form['stripeToken']
    )
    try:

        charge = stripe.Charge.create(
            customer=customer.id,
            amount=amount,
            currency='usd',
            description='Registration payment'
        )
    except StripeError as e:
        ***I want to raise a form validation error here if possible.***

    db.session.commit()
    return redirect(url_for('home'))

return render_template('register.html', form=form)

推荐答案

我通过将错误手动添加到我想要的字段中来解决了这个问题.

I solved it by manually appending errors to the field i wanted.

看起来像这样

try:

    [...]
except StripeError as e:
    form.payment.errors.append('the error message')
else:
    db.session.commit()
    return redirect(url_for('home'))

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