Adding a new child object to an existing object in firebase using angularfire2

Question

I have users data stored in firebase as

users : {
    -KamJGmnL8S4Nn_okIcc : {
        name: "Someone",
        email: "example.com",
        website: "somesite.com"
    },
    -laeghmnw8S4Nn_9inb47 : {
        name: "Someone",
        email: "example.com",
        website: "somesite.com"
    }
}

I need to add a new Object { collections: <key> : { ... }, <key>: { ... } } to an user, say the first user in the above object. I need to be able to push to collections as it can have several objects.

How can i do this with angularfire2?

cartant · Accepted Answer · 2017-01-20 11:17:59Z

2

You could use a list to push them individually:

const uid = "-KamJGmnL8S4Nn_okIcc";
const list = angularFire.database.list(`users/${uid}/collections`);
list.push({ name: "collection-a" });
list.push({ name: "collection-b" });

Or you could use an object to update them together (in a multi-location update):

const uid = "-KamJGmnL8S4Nn_okIcc";
const obj = angularFire.database.object(`users/${uid}`);

let collections = {
    `collections/${obj.$ref.push()}/name`: "collection-a",
    `collections/${obj.$ref.push()}/name`: "collection-b",
};
obj.update(collections);

Note that push keys are generated on the client and you can generate one by calling push with no arguments.

answered Jan 20, 2017 at 11:17

cartant

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