How to perform compound queries with logical OR in Cloud Firestore?

Question

From the docs:

You can also chain multiple where() methods to create more specific queries (logical AND).

How can I perform an <

Answer 1

OR isn't supported

But if you need that you can do It in your code

Ex : if i want query products where (Size Equal Xl OR XXL : AND Gender is Male)

productsCollectionRef
                //1* first get query where can firestore handle it
                .whereEqualTo("gender", "Male")
                .addSnapshotListener((queryDocumentSnapshots, e) -> {

                    if (queryDocumentSnapshots == null)
                        return;

                    List productList = new ArrayList<>();
                    for (DocumentSnapshot snapshot : queryDocumentSnapshots.getDocuments()) {
                        Product product = snapshot.toObject(Product.class);

                        //2* then check your query OR Condition because firestore just support AND Condition
                            if (product.getSize().equals("XL") || product.getSize().equals("XXL"))
                                productList.add(product);
                    }

                    liveData.setValue(productList);

                });