最小长度在以下代码中不起作用。当我为Name提供空值时，它会通过模式验证(它会抛出错误)

const Joi = require('joi');

const schema = Joi.object({
  Name: Joi.string().min(5).required(),
});

const data = {
  Name: '',
};

const result = schema.validate(data);

if (result.error) {
  console.log(result.error.details[0].message); // 输出错误信息
} else {
  console.log('Validation passed'); // 验证通过
}

from flask import Flask, request
from wtforms import Form, StringField, validators

app = Flask(__name__)

class MyForm(Form):
    Name = StringField('Name', [validators.Length(min=5)])

@app.route('/', methods=['POST'])
def validate_form():
    form = MyForm(request.form)

    if form.validate():
        return 'Validation passed'
    else:
        return form.errors['Name'][0]  # 输出错误信息

if __name__ == '__main__':
    app.run()