Hello

I'm currently testing my web app through all browsers on iOS and Android. There is one weird occasion that came up. The user can rate a product and therefore send his comment to the Kinvey cloud. This works all fine on :

iOS: Safari, Chrome, Firefox

Android: Chrome

On Firefox V68.0 (Chrome) I get this error message:

DataError: Data provided to an operation does not meet requirements.

The shortened code (saving user rating) looks like this:   

var productLogStore = Kinvey.DataStore.collection('productlogs');

var content = {
    '_id': logId,
     'userid': activeUser._id,
    'productid': productId,
    'type': logType,
     'rating': rating,
    'text': text,
     'date': $('#' + logId).attr('date')
};

productLogStore.save(content)
     .then(function onSuccess(answer) {
        console.log (answer);
    })
    .catch(function onError(error) {
        console.log (error);
});

 In case of Firefox V68.0 it jumps into the 'catch' and outputs the error message above.

Now I have to mention there is Business Logic on that collection (POSTSAVE) which is working fine and even does the correct job with no errors in Firefox. Only Firefox has a problem with whatever comes back. I even found out that Firefox has a problem with the response.body:

function onPostSave(request, response, modules) {
  // Any changed log will update the RATING/VISIT in PRODUCTS collection of the product
  
  var logger = modules.logger;
  var log = request.body;
  var sumRating = 0;
  var average = 0;
  
  // Only interested in logs
  if (log.type === 'log') {
    
    // Find all logs of the game
    modules.collectionAccess.collection('gamelogs').find({"productid": log.productid, "type": "log"}, function (err, docs) {
      if (err) {
        // logger.error('Query failed: '+ err);
        response.body = {"state": "nok", "error": err};
        response.error();
      } else {
        // Get all ratings in order to calculate the average
        for (var l = 0; l < docs.length; l++) {
          sumRating += docs[l].rating; 
        }
        // Calculate average
        average = Math.round((sumRating / docs.length) * 10) / 10;
      }

      response.body = {"state": "ok", "rating": average, "visit": docs.length};
      response.continue();
      
      logger.info("donner");
      // Update product by rating and visitors (logs)
      modules.collectionAccess.collection("products").update({"_id": log.productid}, {"$set": { "product.rating": average, "product.visit": docs.length} }, function(err, result) {
        if (err) {
          // logger.error('Update failed: ' + err);
          response.body = {"state": "nok", "error": err};
          response.error();
        }
      });
    });
  } 
  else {
    // Notes (not interested
    response.complete(200);
  }
}

 As soon as I remark the this line in the Business Logic it works fine with no error in Firefox:

response.body = {"state": "ok", "rating": average, "visit": docs.length};

Do you see a workaround that still returns the required values and will not lead into an error in Firefox?

Regards

Ha! I've found a workaround that works in all browsers:

Attach the response to a sub-object like this:

response.body.cloud = {...};

  Instead of:

response.body = {...};

I've tested this workaround in all browsers (Chrome, Firefox, Safari) and it works. Consider to catch the response the same way on client-side: 

productLogStore.save(content)
    .then(function onSuccess(answer) {
        var response = answer.cloud;
        ....

Regards 

Just tested on a different Android mobile device with Firefox 64.0.2 : Same problem (error message)