Firebase's push() method compared to Angularfire's $save() operation

When comparing angularfire .$save() to firebase .push(), what are the differences? I understand that push() generates a unique key when data is stored, but I'm having trouble replicating this behavior with angularfire. Should I stick to using .push() or is there a way to achieve the same result with $save()? In what scenarios would you recommend using $save() over .push()?

Here is an example using $save()...

        var fb = new Firebase(FIREBASE_URI).child('Test');
        var article = $firebaseObject(fb);

        article.Foo = "bar";
        article.$save().then(function(fb) {
            console.log(fb.key() === article.$id); // true
        }, function(error) {
            console.log("Error:", error);
        });

And here is an example using .push()...

        var article = new Firebase(FIREBASE_URI).child('Articles');

        article.push({
            title:   $scope.article.title,
            post:    $scope.article.post
        }, function(error) {
            if (error) {
                console.log("Error:", error);
            }
        });

What are the advantages/disadvantages and typical use cases for each method?

Answer №1

Understanding the Relationship Between push/$add and set/$save

Let's delve into how AngularFire's $save() method is closely tied to Firebase's set() method. Both functions serve the purpose of saving data to a specific, known location within the database.

When you look at Firebase's push() operation, you can see a direct correlation with AngularFire's $add() method. Both are responsible for creating a new, unique child key, allowing you to insert data without conflicting with existing entries.

Choosing Between push and set

While the information above remains factual, the decision between push and set can vary based on circumstances. It's crucial to assess your specific scenario instead of blindly following guidelines.

In general, opt for set()/$save() when you're dealing with pre-existing objects in the database or when the objects possess a natural key.

On the other hand, if the items lack intrinsic keys or if you prefer them to be organized chronologically, consider using push()/$add() to automatically generate a key. This ensures that each item is securely stored under a unique identifier and that newer items appear later in the sequence.

For instance, if you're managing user data, it's common practice to store them under their uid with a command like

ref.child('users').child(user.uid).set(user)
. Conversely, if you're adding chat messages to a chat room, you might utilize
ref.child('chat').push({ name: 'Adam Youngers', 'Firebase push() vs Angularfire $save()' })
.

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