The order of keys in a dictionary returned from a server function is changing mysteriously

Anvil Q&A
3

Dictionaries are ordered on both the client and the server but it looks like passing the dictionary from client to server does not guarantee order.

Since portable_classes you can come up with your own serialization and keep the order.

import anvil.server

@anvil.server.portable_class
class odict(dict):
    def __serialize__(self, global_data):
        return list(self.items())
    def __deserialize__(self, data, global_data):
        self.__init__(data)

Here’s proof of concept

https://anvil.works/build#clone:XN3TIGKFYZRMZKFI=FSCEFHEZQ37H2YJRPCZMQBRZ

1 Like