How to check if the field exists in firestore?

Question

I am checking whether the Boolean field called attending exists, however I am not sure how to do that.

Is there a function such as .child().exists()<

Answer 1

You can do the following:

  if(task.isSuccessful()){
    for(QueryDocumentSnapshot document: task.getResult()){
       if (document.exists()) {
          if(document.getBoolean("attending") != null){
             Log.d(TAG, "attending field exists");
          }
        }
      }
  }

From the docs:

public boolean exists ()

Returns true if the document existed in this snapshot.