How to define hidden properties on Angular $scope - angularjs

Question

Consider:
$scope.taylor = {
firstName: 'taylor',
lastName: 'mcintyre',
order: 22
}
Using $resource, I might want to save this:
people.save($scope.taylor);
However, I do not want the property "order" to be sent along with the request.
Angular ignores properties prefixed with '$$' for it's own internal use, but it doesn't feel right prefixing my own hidden properties in this way, e.g.
$scope.taylor = {
firstName: 'taylor',
lastName: 'mcintyre',
$$order: 22
}
Deleting unwanted properties is the common-sense solution, but does Angular have a better solution for this?

Answer 1

I know you are looking for an "Angular way" to exclude keys, but angular.copy() doesn't seem to support this. The angular.toJson() documentation states: Properties with leading $ characters will be stripped since angular uses this notation internally. This sounds like using $ should be reserved for angular and not used by us in our objects.
In light of the situation I created a simple CodePen example showing how easily this can be done using a library like UnderscoreJS.
I'm sure there are more elegant ways to do this, but my example does accomplish what I understood to be your primary goal.
I included the UnderscoreJS library in my file and added the following code:
var person = {
firstName: 'John',
lastName: 'Smith',
order: 22,
excludeKeys: [
'order',
'excludeKeys'
]
};
var personCopy = _.omit(person, person.excludeKeys);
console.log('person: ', person);
console.log('person copy: ', personCopy);
I hope this is useful.