void ReadDataGetDocument()

in firestore/android/FirestoreSnippetsCpp/app/src/main/cpp/snippets.cpp [484:508]

• 20 lines of code
• 3 McCabe index (conditional complexity)

void ReadDataGetDocument(firebase::firestore::Firestore* db) {
  using firebase::Future;
  using firebase::firestore::DocumentReference;
  using firebase::firestore::DocumentSnapshot;
  using firebase::firestore::Error;
  using firebase::firestore::FieldValue;

  // The following example shows how to retrieve the contents of a single
  // document using Get():
  // [START get_document]
  DocumentReference doc_ref = db->Collection("cities").Document("SF");
  doc_ref.Get().OnCompletion([](const Future<DocumentSnapshot>& future) {
    if (future.error() == Error::kErrorOk) {
      const DocumentSnapshot& document = *future.result();
      if (document.exists()) {
        std::cout << "DocumentSnapshot id: " << document.id() << std::endl;
      } else {
        std::cout << "no such document" << std::endl;
      }
    } else {
      std::cout << "Get failed with: " << future.error_message() << std::endl;
    }
  });
  // [END get_document]
}