Subclass disambiguation for nested structures.

[isohedronpipeline]

Subclass disambiguation for nested structures.

[isohedronpipeline]

Another thing I tried was:

_cattr_converter.register_unstructure_hook(
    Toy,
    lambda o: {"_type": type(o).__name__, **_cattr_converter.unstructure(o)},
)

but that caused an infinite loop.

[Tinche]

Hi,

sorry for the delayed response, I was on vacation.

These strategies are somewhat stateful since a lot of them do some of the work at configuration time, rather than structure/unstructure time. This means the order in which they are applied matters.

I tried switching the order of the hooks here:

c = cattr.Converter()
include_subclasses(Toy, c, union_strategy=configure_tagged_union)
include_subclasses(ToyBox, c, union_strategy=configure_tagged_union)

Doing this, the output now is:

{'_type': 'SmallToyBox',
 'contents': [{'_type': 'Lego', 'name': 'space'},
              {'_type': 'Lego', 'name': 'house'},
              {'_type': 'Train', 'name': 'stream'},
              {'_type': 'Train', 'name': 'electric'}],
 'material': 'wood'}

That that look like what you were going for?

[isohedronpipeline]

Yes! Thank you!

I hope you had a good holiday :-)

Can you explain why/how it works by registering Toy prior to ToyBox? It seems a little magical and I'd love to know how that works in case I encounter a simlar issue in the future.

Also, how might I include the hook = make_dict_unstructure_fn(Toy, c, _cattrs_omit_if_default=True) logic in addition to the subclass logic? I can put together some example code of what I'm looking for if you want. Let me know if you'd prefer that to be a separate issue too.

Thanks again, Tin!