Be EXTREMELY cautious when using document-based auto-syncing DBs such as firebase. If you're not closely following the best-practice such as using flat document

Be EXTREMELY cautious when using document-based auto-syncing DBs such as firebase. If you're not closely following the best-practice such as using flat document structure instead of nested ones, and dictionaries instead of arrays, you may enter a world of nasty disappointments as you struggle to query and update your local data structure. Data syncing is hard and so far i've only seen two possibilities : roll your own solution using the fact that you have a knowledge of your business that will help you be smart and small, or use a generic solution but take some time to understand deeply its way of working before you build your real product. I actually had to cancel what i thought would be a short angular/firebase project after two days struggling to sync one big nested data structure displayed on a page, and realizing i actually had to rethink my model from scratch to fit the technology (which ended up being completely overkill for my need anyway).