Firebase.push failed: first argument contains an invalid key ($$hashKey)

Question

I recently started learning AngularJS+Firebase. I\'m trying to write in my firebase an object like this:

{
    title: \"Personal Information\",
    say: [
               


        

Answer 1

The best way to get rid of the $$hasKeys is to use "track by" in ng-repeats as in the following (as mentioned in the answer above)

 ... 

but you can also set track as par of ng-model-options

ng-model-options="{ trackBy: '$value.someKeyOnYourObject' }"

on a form control. This way also improves performance of your angular app.

Another way is to remove the $$hashKey is using

angular.copy(someObj);

If all else fails, you could also use lodash to remove the keys that start with the "$".

_.omitBy(yourObject, function(value, key){return _.startsWith(key, '$');});