Hello guys :slightly_smiling_face: I hope someone ...

# rx

[memphis]

Hello guys 🙂 I hope someone can give me a hint ..
I’m working on a simple weather app .. Once I get data from the API I want to store it using Realm and call a method to fetch data from the database. But the problem is that the method for fetching from db is called before the data are saved into Realm, so I get this :

E/LandingViewModel: onError with java.util.NoSuchElementException List is empty.

[GurpreetSK]

Hey! Looks like your stream returns a maybe, which inherently can or cannot have any element. The stream didnt emit anything, thats why you get this exception.

[gildor]

Please, do not crosspost your messages

[gildor]

Stream returns Flowable, not Maybe

[gildor]

Obviously you get empty list as result, it’s completely valid situation, so you have 2 ways:
1. check that list is not empty before using first(), otherwise you get NoSuchElementException (what you have now)
2. Filter empty lists:
.filter { it.isNotEmpty() }