How to Add Map<String, Object> elements in firebase firestore android using Hashmap? A Store Database

Question

With the last improvement in matrices, you can add, update and delete an element but only in matrix.

But for:

Map<String, Object> comentarios = new HashMap<>();

I probe it and it transforms me a Map to array does not matiene the same type. Someone know how I should do it?

My code is:

final Map<String, Object> nuevoComentario = new HashMap<>();
nuevoComentario.put("comentario", FieldValue.arrayUnion("id5", "Msj add"));
db.collection("Hospedaje").document(documentGetID)
                        .update(nuevoComentario);

Hey Christian. I'm having a really hard time following along with what you're trying to do. Can you add a println to the code that shows what the code delivers, and then show the values you'd expect (in the same format)? — Frank van Puffelen
– Frank van Puffelen, Commented May 17, 2019 at 1:12
My question is that how to manage comments HashMap? (add, update, remove), I have already been able to add, but I have not been able to modify and delete. — Christian M. Salvatierra
– Christian M. Salvatierra, Commented May 17, 2019 at 2:43
@Frank I want to do the same as this but using HashMap and not an Array : stackoverflow.com/questions/51202300/… — Christian M. Salvatierra
– Christian M. Salvatierra, Commented May 17, 2019 at 2:47

Jakub Kostka · Accepted Answer · 2019-08-22 15:44:31Z

0

From what I understand FieldValue.arrayUnion and FieldValue.arrayRemove are just for array fields, which HashMap isn't really. Try using db.collection("Hospedaje").document(documentGetID).update("myHashMapField", "key" to /value/);

edited Aug 22, 2019 at 15:44

answered Aug 22, 2019 at 14:56

Jakub Kostka

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