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我通过输入一些错误的内容测试了我的代码，但是一旦我单击提交，屏幕上就没有生成错误消息

我也尝试输入正确的内容来尝试，但是一旦我检查打印，它表明验证总是失败。（解决了）

应用程序：

@app.route('/register', methods=['GET', 'POST'])
def register():
    form = RegisterForm()
    if form.validate_on_submit():
        print('validated')
        username = form.username.data
        password = bcrypt.generate_password_hash(form.password.data)
        email = form.mail.data
        print(username, password, email)
        flash("Successfully registered")
    else:
        print('validation failed')
    return render_template('register.html', form=form)

注册表格：

from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, SubmitField
from wtforms.validators import DataRequired, Length, EqualTo, Email

class RegisterForm(FlaskForm):
    username = StringField('Username', [validators.Length(min=4, max=25)])
    password = PasswordField('Password', validators=[DataRequired(), Length(min=6, max=20)])
    confirm_password = PasswordField('Re-enter Password', validators=[DataRequired(), EqualTo(password)])
    email = StringField('Email', validators=[DataRequired(), Email()])
    submit = SubmitField('Register')

html:

{% extends 'base.html' %}
{% import "bootstrap/wtf.html" as wtf %}

{% block content %}
    <div class = 'container'>
        <br>
        <h1>Register Now</h1>
        <br>
        <div class="row">
            <div class="col-md-8">
                {{ form.hidden_tag() }}
                {{ wtf.form_errors(form, hiddens="only") }}

                {{ wtf.form_field(form.username) }}
                {{ wtf.form_field(form.password) }}
                {{ wtf.form_field(form.confirm_password) }}
                {{ wtf.form_field(form.email) }}
                {{ wtf.form_field(form.submit) }}
            </div>
        </div>
    </div>
{% endblock %}

我也试过

{{ wtf.quick_form(form) }}

但它也不会生成错误消息。

4

1 回答 1

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您是否尝试过：

{{ wtf.form_errors(form) }}

根据文档：

hiddens – 如果为 True，则也呈现隐藏字段的错误。如果“仅”，则仅渲染这些。

所以你只显示隐藏字段的错误。

于 2019-06-20T07:42:18.497 回答