Express-Validator 5.2.0 - Validate Wildcard Array Of Objects - Compare

I am trying to validate an array of objects with express-validator. I have been using the new 'wildcard' along with the 'custom', to iterate over the array of objects comparing ke

Solution 1:

For now, can be done this way also

req
.checkBody("flavors","Please enter a name for this flavor.")
.custom(data => 
   Array.isArray(data) 
      && 
   data.length 
      && 
   data.every(item => item.name && item.percentage > 0));

I hope it helps :)

Solution 2:

This is not natively supported at the moment, but it may be partially available when this issue gets implemented.

For now, with some help from lodash's _.toPath(), you can achieve it:

req.checkBody('flavors.*.name').custom((name, { req, location, path }) => {
  const index = _.toPath(path)[1];
  const { percentage } = req[location].flavors[index];

  // If percentage is 0, then it's always valid.
  return percentage > 0 ? name !== '' : true;
});