TypeError: req.checkBody(...).optional(...).isDate is not a function

Question

我在使用 express 验证器时遇到问题，特别是 isDate 函数。我已经采取措施使用 expressvalidator、bodyparse、validator 模块等。所有路由仅在此之后.. 环境是 Node + Express。

问题出在

的用法上

"req.checkBody('date_of_birth', 'Invalid date').optional({ checkFalsy: true }).isDate();"

我不断收到以下错误。

TypeError: req.checkBody(...).optional(...).isDate is not a function
    at exports.author_create_post (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/controllers/authorController.js:47:81)
    at Layer.handle [as handle_request] (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/layer.js:95:5)
    at next (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/layer.js:95:5)
    at /Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/index.js:281:22
    at Function.process_params (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/index.js:335:12)
    at next (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/index.js:275:10)
    at Function.handle (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/index.js:174:3)
    at router (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/index.js:47:12)
    at Layer.handle [as handle_request] (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/index.js:317:13)
    at /Users/svitaworld/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/index.js:284:7
    at Function.process_params (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/index.js:335:12)
    at next (/Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/index.js:275:10)
    at /Users/mycomputer/Desktop/NodeJS/express-locallibrary-tutorial/node_modules/express/lib/router/index.js:635:15

app.js

app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
  extended: false
}));
app.use(expressValidator()); // Add this after the bodyParser middlewares!
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', index);
app.use('/users', users);
app.use('/catalog', catalog); // Add catalog routes to middleware chain.

在我的一个控制器中，我使用 isDate() 方法对我在 AuthorSchema 中单独定义的日期进行一些验证。

var AuthorSchema = Schema(   {
  first_name: {type: String, required: true, max: 100},
  family_name: {type: String, required: true, max: 100},
  date_of_birth: {type: Date},
  date_of_death: {type: Date},   
} );

现在要处理 post 请求，我在控制器中有以下代码：

authorController.js -- 来自第 41-48 行的行

// Handle Author create on POST
exports.author_create_post = function(req, res, next) {
  console.log("DEBUG: starting in exports.author_create_post");
  req.checkBody('first_name', 'First name must be specified.').notEmpty(); 
  req.checkBody('family_name', 'Family name must be specified.').notEmpty();
  req.checkBody('family_name', 'Family name must be alphanumeric text.').isAlpha();
  req.checkBody('date_of_birth', 'Invalid date').optional({ checkFalsy: true }).isDate(); // Error is on this usage of isDate()
  req.checkBody('date_of_death', 'Invalid date').optional({ checkFalsy: true }).isDate();

Answer 1

isDate() 已从 validator.js 中删除。您可以在 GitHub 上查看 this 提交以获取更多信息。 express-validator 使用 validator.js 进行验证。

您可以制作自定义验证器来检查有效日期。对于新的 API:

check('date').custom(isValidDate).withMessage('the date must be valid');

为了遗产API：

app.use(expressValidator({
  customValidators: {
    isValidDate: isValidDate
  }
}));

当您应用中间件（在 app.js 或类似的东西中）并进行检查时：

req.checkBody('date', 'the date must be valid').isValidDate();

isValidDate()得自己写。这是一个例子：

function isValidDate(value) {
  if (!value.match(/^\d{4}-\d{2}-\d{2}$/)) return false;

  const date = new Date(value);
  if (!date.getTime()) return false;
  return date.toISOString().slice(0, 10) === value;
}

这会检查 yyyy-mm-dd 格式的日期。它取自 this 答案。 Stack Overflow 上还有许多针对不同格式的其他答案：

mm/dd/yyyy
dd/mm/yyyy

或者使用瞬间的isValid().

TypeError: req.checkBody(...).optional(...).isDate is not a function

TypeError: req.checkBody(...).optional(...).isDate is not a function

javascript

node.js

express

express-validator