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> Class `ArrayList` is not registered for polymorphic serialization in the scope of `Any`. Mark t...
# serialization
m
Class 
ArrayList
is not registered for polymorphic serialization in the scope of 
Any
. Mark the base class as 
sealed
or register the serializer explicitly.
Class 
SingletonList
is not registered for polymorphic serialization in the scope of 
Any
. Mark the base class as 
sealed
or register the serializer explicitly.
Do I really have to do this dance for every possible implementation of 
Collection
? 😮 Also, how do I register subclasses of 
Collection
? There’s no 
Collection.serializer()
or 
ArrayList.serializer()
I could use for polymorphism 🤔
j
You don't register for subtypes. You delegate to 
List.serializer()
by calling 
toList()
on the 
Collection
value first (in a serializer for 
Collection
)
m
The list is boxed generically multiple times, e.g. 
Foo<Bar<*>>
where 
*
has no upper bound and may be a 
Collection<Something>
. It looks like I cannot solve that with a polymorphic serializer 😕
Even if I can pass the serializer for 
<T>
I’d still have to provide an own 
Collection
serializer and cannot rely on 
serializer<T>()
? ugh 😕
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