Custom IDs In Firebase

30 / Mar / 2015 by Mohit Tyagi 2 comments

Firebase is a service that allows us to create real-time apps without having a native back-end(server). Storing and retrieving of data in real-time is done directly from the browser(front-end), i.e. no back-end services is required to fetch the data.

Whenever we save data in Firebase, it generates a unique identification ID for each object. Sometimes it’s hard to maintain or traverse the data on the basis of these randomly generated IDs, because the only way to access data in Firebase is via URL reference (refObject/books//title) for the particular node. So sometimes we need to store data object with our own custom keys.

var onComplete = function(error) {
    if (error) {
        console.log('Operation failed');
    } else {
        console.log(' Operation completed');
    }
};

We can save data into firebase using push() method.

var booksRef = ref.child("books");

booksRef.push({
    author: " Adam Freeman",
    title: "Pro AngularJS"
}, onComplete);

booksRef.push({
    author: "Niall OHiggins",
    title: "MongoDB and Python"
}, onComplete);

The above code saves two objects into my data store and if the operation is successful, an auto-generated ID by Firebase is set as key for respective data objects.
Now, the data store in Firebase will look like:

{
    "books" : {
    		"-Jldh2kvv9KyrkBuTTjV" : {
        		"author" : " Adam Freeman",
           		"title" : "Pro AngularJS"
    		},
   		 "-Jldh2kx0AgFXU1-Umnx" : {
       		"author" : "Niall OHiggins",
           		"title" : "MongoDB and Python"
    		}
	}
}

Sometimes, we need to store data with custom IDs. Such as Email-ID, UserName etc.
We can use set() method to save our data in Firebase.

 var booksRef = ref.child("books");
 booksRef.child('Adam Freeman').set({
     title: "Pro AngularJS"
 }, onComplete);

 booksRef.child('Niall OHiggins').set({
     title: "MongoDB and Python"
 }, onComplete);

Now, the data store in Firebase will look like :

{
    "books" : {
    		"Adam Freeman" : {
       		 "title" : "Pro AngularJS"
    		},
    		"Niall OHiggins" : {
      		  "title" : "MongoDB and Python"
  	  	}
	}
}

To learn more about Firebase visit: Firebase

Tag -

firebase
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comments (2)

  1. Jakub

    There is one problem with e-mail as custom ID. When I try it I get error “Firebase.child failed: First argument was an invalid path: “john.doe@example.com”. Paths must be non-empty strings and can’t contain “.”, “#”, “$”, “[“, or “]””

    Reply

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