Express Validator:参数如何传递给验证器函数

Question

我很好奇如何将参数传递给验证器中间件，摘录自快件-验证器，例如，将快件-验证器传递给check()函数。

const { check, oneOf, validationResult } = require('express-validator/check');
app.post('/start-freelancing', oneOf([
  check('programming_language').isIn(['javascript', 'java', 'php']),
  check('design_tools').isIn(['photoshop', 'gimp'])
]), (req, res, next) => {
  try {
    validationResult(req).throw();

    // yay! we're good to start selling our skilled services :)))
    res.json(...);
  } catch (err) {
    // Oh noes. This user doesn't have enough skills for this...
    res.status(422).json(...);
  }
});

Answer 1

check('programming_language')

'programming_language‘是一个请求参数。不需要单独传递任何东西。它是从

req.body.programming_language
req.cookies.programming_language
req.headers.programming_language
req.params.programming_language
req.query.programming_language

“design_tools”也是一样的

req.body.design_tools
req.cookies.design_tools
req.headers.design_tools
req.params.design_tools
req.query.design_tools