javascript - NodeJs Express-Validator 自定义验证器不起作用

Question

我使用express-validator customValidators来添加一些特定的验证器:

middlewares.js

module.exports = function (app) {
     console.log('to be sure that Im called');
     return function (request, response, next) {
         app.use(expressValidator({
            customValidators: {
                checkObjectId: function(name) {
                    return /^[0-9a-fA-F]{24}$/.test(name);
                }
            }
         }));
         next();
     }
};

route.js

const middleware = require(__path + '/middlewares');
module.exports = function (app, passport) {
    router.use(baseUrl, middleware(app));
    // some codes
    router.put(baseUrl + '/invoice/:invoiceId', api.invoices.invoices.update);
}

发票.js

    update: (request, response) => {
        // some codes
        request.checkBody('from', 'invalid Supplier Id').checkObjectId();
        // some codes
    },

我的问题是 checkObjectId 无法识别，并且出现以下错误:

TypeError: request.checkBody(...).checkObjectId is not a function

Answer 1

您正在导出一个函数，该函数导出一个声明中间件的中间件。

这应该足够了:

// middlewares.js
module.exports = expressValidator({
  customValidators: {
    checkObjectId: function(name) {
      return /^[0-9a-fA-F]{24}$/.test(name);
    }
  }
});

并使用:

const middleware = require(__path + '/middlewares');
module.exports = function (app, passport) {
  router.use(baseUrl, middleware);
  ...
}

如果你确实想导出一个返回中间件的函数，你可以使用这个:

module.exports = function(app) {
  return expressValidator({
    customValidators: {
      checkObjectId: function(name) {
        return /^[0-9a-fA-F]{24}$/.test(name);
      }
    }
  })
};