AngularJS form and null/empty values

Question

I am working with a somewhat dynamic AngularJS form. In other words, I am able to add rows of input fields, etc. So my approach was to start with a $scope.formData

Answer 1

Added Watcher on formData,

$scope.$watch('formData',function(n,o){
      if(typeof $scope.formData.title !== 'undefined' && $scope.formData.title === "" ){
        delete $scope.formData.title;
      }
},true);

Updated fiddle: https://jsfiddle.net/1ua6oj5e/6/

For all the dynamic fields you should use angular form validation, you should see this: https://docs.angularjs.org/guide/forms