from typing import List, Optional
from pydantic import BaseModel, constr, conint

class AuthorCreate(BaseModel):
    name: constr(min_length=2, max_length=100)

class AuthorModel(BaseModel):
    id: int
    name: str

    class Config:
        orm_mode = True

class BookCreate(BaseModel):
    title: constr(min_length=1, max_length=100)
    author_id: conint(gt=0)

class BookModel(BaseModel):
    id: int
    title: str
    author_id: int
    status: Optional[str] = None

    class Config:
        orm_mode = True

class BookWithAuthor(BookModel):
    author: AuthorModel