Validate array of objects in Node

Question

I have an array that looks something like this

  settings: [
    { key: 'maxImageSize', value: '512' },
    { key: 'maxFileSize', value: '2048' },
    { key: 'searchResultsLimit', value: '10' },
  ]

I would like to validate the value of each key before saving them to a database.

Example: searchResultsLimit should be greater than 1 but never exceed 20.

I am using Objection.js and express-validator.

Thanks.

What would you like to do if one of those settings failed validation? just throw an error or discard it from settings array? — Ahmad Nabil, Oct 21 '21 at 12:33

score 0 · Answer 1 · answered Oct 22 '21 at 16:10

Here's a function that returns a boolean based on whether the array is valid or invalid.


function myValidate(settings) {
  try {
    settings.map((setting) => {
      if (validator.toInt(setting.value) <= 1 || validator.toInt(setting.value) >= 20) {
        console.log(setting.value);
        throw new Error("Invalid");
      }
    });
  } catch (e) {
    console.log(e.message);
    return false;
  }
  return true;
}

Turns out validator.js does not provide a validator to check if a number is in range. Check https://github.com/validatorjs/validator.js/issues/330 for details.

In case you want to just ignore the items that are invalid, you can use the filter method instead to get the items in the required range.

Validate array of objects in Node

1 Answers1