Flutter Firestore add new document with Custom ID

Question

How to add new document with custom id using Dart and Flutter?

PS: I can add new document to collection but its id sets randomly, using this code

postRef.add(data);

which postRef is CollectionReference and data is Map<String, dynamic>

Answer 1

You can use set() function instead of add().

Here's full code:

final CollectionReference postsRef = Firestore.instance.collection('/posts');  var postID = 1;  Post post = new Post(postID, "title", "content"); Map<String, dynamic> postData = post.toJson(); await postsRef.doc(postID).set(postData); 

I hope that help anyone.

Answer 2

Update 2021:

Instead of using add, use set on the document.

var collection = FirebaseFirestore.instance.collection('collection'); collection      .doc('doc_id') // <-- Document ID     .set({'age': 20}) // <-- Your data     .then((_) => print('Added'))     .catchError((error) => print('Add failed: $error'));