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from dataclasses import dataclass
from apischema import Undefined, UndefinedType, deserialize, serialize
from apischema.json_schema import deserialization_schema
@dataclass
class Foo:
bar: int | UndefinedType = Undefined
baz: int | UndefinedType | None = Undefined
assert deserialize(Foo, {"bar": 0, "baz": None}) == Foo(0, None)
assert deserialize(Foo, {}) == Foo(Undefined, Undefined)
assert serialize(Foo, Foo(Undefined, 42)) == {"baz": 42}
# Foo.bar and Foo.baz are not required
assert deserialization_schema(Foo) == {
"$schema": "http://json-schema.org/draft/2020-12/schema#",
"type": "object",
"properties": {"bar": {"type": "integer"}, "baz": {"type": ["integer", "null"]}},
"additionalProperties": False,
}
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