Nested maps in Firebase and custom objects
问题 Apologies for the rather basic question but I am having a little trouble with my code. I intended to create a database of events and I wanted the flexibility of retrieving an entire day's worth of events, or a month's worth or even a years worth. So I decided to store the data under 'year'>'month'>'day'. Initially I tried to do it using custom java objects that I thought would be easier to work with, but unfortunately this adds an extra child node between each object with the name of the