问题
I have a lot of entry in the same location. I would like only to get the 10 latest added items using Geofire. I know that it can be done easily with firebase using Query.limitToLast() but I don't know how to do it with Geofire.
If it is not possible, do you have any workaround that I can apply ?
回答1:
There is only one solution for this :
you should begin a query with a small radius,
and each time you reach onGeoQueryReady() ("All data has been loaded"), you increase the radius by a small amount of the geoquery with .setRadius(r) until you reach the limit you want
based on this https://github.com/firebase/geofire-js/issues/59
回答2:
There is no way to limit the number of keys from Geofire: it will return all keys that fall into the range you query for.
The only thing I can think of is to not insert items if there is already another item in its vicinity. You're essentially clustering items while writing to the database in that case.
来源：https://stackoverflow.com/questions/38544974/limit-the-number-of-queried-items-from-geofire