How to push an object in array field using Firebase DB

Question

I want to push an object in array field of Firebase database.

I've tried,

  const friendObj = {
    first_name: item.first_name,
    last_name: item.last_name,
    username: item.username,
    phoneNumber: item.phoneNumber,
    email: item.email,
  }
  db.collection('users')
    .doc('documentId')
    .set({ friends: friendObj })

I want to add an object in friends array of below table. My firebase table looks like below

Can anyone please help me, I'm having difficulty while add value in DB.

I've never used a firebase database, but could it be that your are not passing the email? making the query fail? — Auticcat
– Auticcat, Commented Aug 28, 2019 at 12:11
You can pass array data directly instead. cloud.google.com/firestore/docs/manage-data/add-data var docData = { stringExample: "Hello world!", booleanExample: true, numberExample: 3.14159265, dateExample: firebase.firestore.Timestamp.fromDate(new Date("December 10, 1815")), arrayExample: [5, true, "hello"], nullExample: null, objectExample: { a: 5, b: { nested: "foo" } } }; db.collection("data").doc("one").set(docData).then(function() { console.log("Document successfully written!"); }); — Sunil tc
– Sunil tc, Commented Aug 28, 2019 at 12:41
@Suniltc i've one object in array and i want to push other one! — Hardik Virani
– Hardik Virani, Commented Aug 28, 2019 at 12:44
This answer might help you. stackoverflow.com/questions/47295541/… — Sunil tc
– Sunil tc, Commented Aug 28, 2019 at 18:30

Asela Wijesinghe · Accepted Answer · 2019-08-28 12:30:14Z

-1

Firebase doesn't actually have a data type as arrays, but you have few alternatives to store data as an array using an alternative (like sets) and there are methods specifically to work with those.

Check this link for an implementation https://stackoverflow.com/a/40055996/11945277

answered Aug 28, 2019 at 12:30

Asela Wijesinghe

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3 Comments

Hardik Virani Over a year ago

firebase has data type array @Asela

daraul Over a year ago

This isn't true. They do have arrays, and you can add things to them from the dashboard.

Asela Wijesinghe Over a year ago

@HardikVirani sorry to disappoint you guys, you can call it an array but technically its a different story as i mentioned. kindly follow the links i have shared and do some further reading on it too. here's something from the official blog : firebase.googleblog.com/2014/04/…

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