Firebase Firestore add item issue
When you construct a custom type and trying to add to firestore. with the following text book code: constructor(private afs: AngularFirestore) { this.itemsCollection = afs.collection<Item>(‘items’); this.items = this.itemsCollection.valueChanges(); } add(item: Item){ this.itemsCollection.add(item); } There will be an error: Exception caught: (FirebaseError) : Function CollectionReference.add() requires its first argument to be of type object, but it…