[Question] serialize/deserialize a computed element

[lionpeloux]

Hi there,

First of all thank you for this great lib !
I've been trying for hours to do what looks like a very simple thing, but could not succeed :

a and b are passed at init time Test(a="A", b="B").
The computed element is correctly serialize to xml to A#B
But how to do deserialization, that is assigned back A and B from A#B?
I've tried many options, playing wing with custom validators and sertializers but could not make it, including the ones from pydantic (model_post_init, @model_validator, ...)

Any hint would be awsome !

PS : think of it as last_name + first_name = full_name

class Test(BaseXmlModel):  
  a: str | None = Field(exclude=False, default=None)
  b: str | None = Field(exclude=False, default=None)
  
  @computed_element(tag='a_and_b')  # type: ignore
  def a_and_b(self) -> str:
    return f"{self.a or ''}#{self.b or ''}"