Reading Hivebox value is returning List<dynamic> instead of saved List<Object>

Question

I save a List to an index in a Hive Box.

class Person { 
 String name;
 Person(this.name);
}

List<Person> friends = [];
friends.add(Person('Jerry'));

var accountBox = Hive.openBox('account');
accountBox.put('friends',friends);

//Testing as soon as saved to make sure it's storing correctly.
List<Person> friends = accountBox.get('friends');
assert(friends.length == 1);

so all this works as intended. For some crazy reason when I hot restart the app and try to get the list of friends from Hive, it no longer returns a List<Person>. It returns a List<dynamic>

var accountBox = Hive.openBox('account');
List<Person> friends = accountBox.get('friends');

///ERROR
E/flutter (31497): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled
Exception: type 'List<dynamic>' is not a subtype of type 'List<Person>'
E/flutter (31497): <asynchronous suspension>
etc...

What could be causing this? It's so unusual.

Answer 1

This solved the problem for me

var fooBox = await Hive.openBox<List>("Foo");

var foosList = fooBox.get("foos", defaultValue: []).cast<Foo>();
print(foosList);

This solution from github issue

Answer 2

There's is an easy way of transforming back your information.

List<T> myList = box.get('key', defaultValue: <T>[]).cast<T>();

As you can see in this example when you get your data you just need to tell the Type for you data to be correctly assigned.