AngularFire向Firebase添加数据：如何不生成唯一键写入？

云上老周

2026-5-27

How to Add Data to Firebase Without Generating a Unique Key

Hey Alex, I see the issue you're facing—using $add is causing Firebase to auto-generate a unique key, which isn't what you want. Let's fix that!

Why `$add` Creates a Unique Key

The $add method is specifically designed for FirebaseArray instances to add items to a list, which is why it automatically generates a unique push ID. If you want to set data directly at a specific path without that auto-generated key, you need to use different methods.

Solution 1: Update or Set Data Directly on the Reference

Your newRef points directly to the user's node (users/5QMI4UsOeAXZUxxkuy5jozcrrSK2). To add the email field directly under this node (no extra unique key), use either $update or $set:

Using `$update` (preserves existing data, adds/updates the email field)

var userRef = GetArrayFactory('users', firebaseUser.uid); // Reference to the user's node
userRef.$update({ 'email': email }).then(function() {
  console.log("User email successfully added/updated!");
}).catch(function(error) {
  console.error("Error updating email:", error);
});

Using `$set` (replaces the entire node content with the new data)

Use this if you want to overwrite all existing data under the user's node with just the email:

var userRef = GetArrayFactory('users', firebaseUser.uid);
userRef.$set({ 'email': email }).then(function() {
  console.log("User data successfully set!");
}).catch(function(error) {
  console.error("Error setting user data:", error);
});

Solution 2: Add Data Under a Custom Key

If you want to store the email under a specific custom key (instead of auto-generated), you can create a child reference and use $set:

var userRef = GetArrayFactory('users', firebaseUser.uid);
var customKeyRef = userRef.child('user_email'); // Your custom key
customKeyRef.$set(email).then(function() {
  console.log("Email added under custom key 'user_email'!");
});