android - How to update elements in arrays of maps in Firestore?

Question

I have and Android App (java) that accesses firestore documents that comprise of an array field as shown:

{
  cards: 
    [
      {
        reference: "",
        response: {
                    text: "",
                    title: "",
                  },
        timestamp: ""
      },

      {
        reference: "",
        response: {
                    text: "",
                    title: "",
                  },
        timestamp: ""
      },

     .... and so on

I would like to update specific fields of each array element, like "response" : "text" and "response" : "title". What is the best way to achieve this?

I have read in several places that arrays cannot be updated at element level and that I may have to completely overwrite the entire array. Is that true? Is so, how can I construct my update statement in Android (Java) for the same?

Thanks,

AB

Answer 1

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