Firestore supports OR operator by IN operator (check this). In Java API this is whereIn method.
Please check reference here.

Good Luck!

Hello I am fairly new to Firestore and android studio. I am trying to query two different fields within a document so as to fetch that document within a collection in Firestore. In this case the collection name is Dispatch_Records and the documents within the collection contain an auto id. The two fields within the document are driver_identity and extra_driver_identity. The query should fetch a document if the current user Id is equal to that in the field of driver_identity or extra_driver_identity in that document. I noticed that Firestore does not have an OR operator. What can I do so that I can fetch the document required? Below is the code:

 String user_id = firebaseAuth.getCurrentUser().getUid();

 firebaseFirestore.collection("Dispatch_Records").whereEqualTo("driver_identity",user_id)
                .whereEqualTo("extra_driver_identity",user_id)
                .addSnapshotListener(Deployments.this,new EventListener<QuerySnapshot>() {
            @Override
            public void onEvent(@Nullable QuerySnapshot queryDocumentSnapshots, @Nullable FirebaseFirestoreException e) {

                if(!queryDocumentSnapshots.isEmpty()){

                    for(DocumentChange doc: queryDocumentSnapshots.getDocumentChanges()){

                        if(doc.getType() == DocumentChange.Type.ADDED){


                            String dispatchId = doc.getDocument().getId();
                            DeploymentsConstructor deployment = doc.getDocument().toObject(DeploymentsConstructor.class).withId(dispatchId);
                            deploymentsList.add(deployment);
                            deploymentRecyclerAdapter.notifyDataSetChanged();


                        }

                    }




                }

            }
        });