node.js - express-validator:如何检查查询

Question

使用 express-validator 我们如何检查请求的查询？

文档中有一个检查正文的示例:

const { check, validationResult } = require('express-validator/check');

app.post('/user', [
  // username must be an email
  check('username').isEmail(),
  // password must be at least 5 chars long
  check('password').isLength({ min: 5 })
], (req, res) => {
  // Finds the validation errors in this request and wraps them in an object with handy functions
  const errors = validationResult(req);
  if (!errors.isEmpty()) {
    return res.status(422).json({ errors: errors.array() });
  }

  User.create({
    username: req.body.username,
    password: req.body.password
  }).then(user => res.json(user));
});

如何将其设置为仅检查 GET 方法的查询？

GET/用户？用户名=名称我只想在此处的查询中检查用户名。

Answer 1

要检查查询参数(即 req.query)中的变量，请使用 query([fields, message])。与 check([fields, message]) 相同，但仅检查 req.query。

示例:

安装快速验证器

npm install --save express-validator

导入查询

const { query } = require('express-validator/check');

使用查询

router.post('/add-product', 
                isAuth, 
                [
                    query('title')
                        .isString().withMessage('Only letters and digits allowed in title.')
                        .trim()
                        .isLength({min: 3}).withMessage('Title too short. Enter a longer title!'),
                    query('price', 'Enter a valid price.')
                        .isFloat(),
                    query('description')
                        .trim()
                        .isLength({min: 30, max: 600}).withMessage('Description must be of minimum 30 and maximum 600 characters!'),
                ],
                adminController.postAddProduct);

请参阅此处的官方文档:https://express-validator.github.io/docs/check-api.html