from typing import Optional, Union

from dirty_equals import IsDict
from fastapi import FastAPI
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: Optional[str] = None


class OtherItem(BaseModel):
    price: int


@app.post("/items/")
def save_union_body(item: Union[OtherItem, Item]):
    return {"item": item}

from typing import Optional, Union

from dirty_equals import IsDict
from fastapi import FastAPI
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: Optional[str] = None


class ExtendedItem(Item):
    age: int


@app.post("/items/")
def save_union_different_body(item: Union[ExtendedItem, Item]):
    return {"item": item}

```Python
    first_name="john", last_name="doe"
```

Es algo diferente.

Estamos usando los dos puntos (`:`), no un símbolo de igual (`=`).

Añadir los type hints normalmente no cambia lo que sucedería si ellos no estuviesen presentes.

Pero ahora imagina que nuevamente estás creando la función, pero con los type hints.

En el mismo punto intentas iniciar el auto-completado con `Ctrl+Space` y ves:

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Click on the button "Try it out", it allows you to fill the parameters and directly interact with the API:

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png)

* Then click on the "Execute" button, the user interface will communicate with your API, send the parameters, get the results and show them on the screen:

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Click on the button "Try it out", it allows you to fill the parameters and directly interact with the API:

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-04-swagger-03.png)

* Then click on the "Execute" button, the user interface will communicate with your API, send the parameters, get the results and show them on the screen:

labels.related_query_term=Term
labels.related_query_title_details=Related Query
labels.crud_button_create=Create
labels.crud_button_update=Update
labels.crud_button_delete=Delete
labels.crud_button_back=Back
labels.crud_button_edit=Edit
labels.crud_button_search=Search
labels.crud_button_reset=Reset
labels.crud_button_cancel=Cancel
labels.crud_link_create=Create New
labels.crud_link_delete=Delete

labels.related_query_term=Term
labels.related_query_title_details=Related Query
labels.crud_button_create=Create
labels.crud_button_update=Update
labels.crud_button_delete=Delete
labels.crud_button_back=Back
labels.crud_button_edit=Edit
labels.crud_button_search=Search
labels.crud_button_reset=Reset
labels.crud_button_cancel=Cancel
labels.crud_link_create=Create New
labels.crud_link_delete=Delete

labels.group_list_name = 이름
labels.group_name = 이름
labels.group_title_details = 그룹
labels.crud_button_create = 작성
labels.crud_button_update = 업데이트
labels.crud_button_delete = 삭제
labels.crud_button_back = 돌아가기
labels.crud_button_edit = 편집
labels.crud_button_search = 검색
labels.crud_button_reset = 재설정
labels.crud_button_cancel = 취소
labels.crud_link_create = 새로 만들기
labels.crud_link_delete = 삭제
labels.crud_link_edit = 편집

labels.related_query_term=Begriff
labels.related_query_title_details=Verwandte Anfragen
labels.crud_button_create=Erstellen
labels.crud_button_update=Aktualisieren
labels.crud_button_delete=Löschen
labels.crud_button_back=Zurück
labels.crud_button_edit=Bearbeiten
labels.crud_button_search=Suche
labels.crud_button_reset=Zurücksetzen
labels.crud_button_cancel=Abbrechen
labels.crud_link_create=Neu erstellen
labels.crud_link_delete=Löschen

Das gleiche wird passieren, wenn Sie eine <abbr title='Eine Union mehrerer Typen bedeutet: „Irgendeiner dieser Typen“'>Union</abbr> mehrerer Typen haben, und einer oder mehrere sind nicht gültige Pydantic-Typen. Zum Beispiel funktioniert folgendes nicht 💥:

=== "Python 3.10+"

    ```Python hl_lines="8"