Possible to validate array of objects?

Say I’ve got an array of rooms, each room requires a room-number, nr of adults, nr of childs. It it currently possible to use dot-syntax to validate for rooms inside array?

req.checkBody(rooms.roomNumber).isEmpty() doesn’t seem to work, which I understand because it probably checks for property roomNumber on the array-object itself. Is there any way to do it instead?

I’m ok with iterating the separate rooms in a loop and checking, but I can’t use req.checkBody for that I belive. I’d need something like validator.checkParam(room).

Any suggestions?

[Jakeii]

You could combine a custom validator with validator.js.

expressValidator = require('express-validator');
validator = require('validator');

app.use(expressValidator({
 customValidators: {
    eachIsEmpty: function(values, prop) {
      return values.every(function(val) {
         return validator.isEmpty(val.prop);
      });
    }
 }   
}));

req.checkBody('rooms').eachIsEmpty('roomNumber');

You could probably improve on this to add an array version for each method programmatically.

[bryanCoteChang]

Hi! I had a similar problem writing a generic validator for all routes. This seems to be working so far, but please let me know if I’m leaving a gaping hole somewhere:

var escape = require('escape-html');

function validate(input) {
  if (Array.isArray(input)) {
    return input.map(validate);
  }
  
  const inputType = typeof input;
  if (inputType === 'string') {
    return escape(input);
  } else if (inputType !== 'object' || !input) {
    return input;
  }

  var output = {};
  Object.keys(input).forEach((key) => {
    output[key] = validate(input[key]);
  });
  return output;
};

module.exports = {
  validate: validate,
}