Check if Field Already exists in Flutter Firestore

Question

I have a collection called company. All the companies are going to be stored like in my screenshot.

When I add another company, I want

Answer 1

I know I am late. Posting for future users. Try this:

DocumentReference datab = db.collection("Company").document("Nova");


                    datab.get().addOnSuccessListener(new OnSuccessListener() {
                        @Override
                        public void onSuccess(DocumentSnapshot documentSnapshot) {

                            if(documentSnapshot.contains("name"))
                            {
                                Toast.makeText(YourActivity.this, "Child exixts.", Toast.LENGTH_SHORT).show();

                            }
                            else
                                Toast.makeText(YourActivity.this, "Doesnt exits.", Toast.LENGTH_SHORT).show();


                        }
                    });