from dataclasses import field # (1)
from typing import List, Union

from fastapi import FastAPI
from pydantic.dataclasses import dataclass # (2)


@dataclass
class Item:
 name: str
 description: Union[str, None] = None


@dataclass
class Author:
 name: str
 items: List[Item] = field(default_factory=list) # (3)


app = FastAPI()


@app.post("/authors/{author_id}/items/", response_model=Author) # (4)
async def create_author_items(author_id: str, items: List[Item]): # (5)
 return {"name": author_id, "items": items} # (6)


@app.get("/authors/", response_model=List[Author]) # (7)
def get_authors(): # (8)
 return [ # (9)
 {
 "name": "Breaters",
 "items": [
 {
 "name": "Island In The Moon",
 "description": "A place to be be playin' and havin' fun",
 },
 {"name": "Holy Buddies"},
 ],
 },
 {
 "name": "System of an Up",
 "items": [
 {
 "name": "Salt",
 "description": "The kombucha mushroom people's favorite",
 },
 {"name": "Pad Thai"},
 {
 "name": "Lonely Night",
 "description": "The mostests lonliest nightiest of allest",
 },
 ],
 },
 ]