from pydantic import BaseModel, Field from typing import Optional from datetime import datetime class BookBase(BaseModel): title: str = Field(..., min_length=1, max_length=200, description="Book title") author: str = Field(..., min_length=1, max_length=100, description="Book author") description: Optional[str] = Field(None, description="Book description") isbn: str = Field(..., min_length=10, max_length=13, description="Book ISBN") publication_year: int = Field(..., ge=1000, le=2100, description="Year of publication") publisher: str = Field(..., min_length=1, max_length=100, description="Book publisher") cover_image: Optional[str] = Field(None, description="URL to book cover image") price: int = Field(..., ge=0, description="Book price in cents") is_available: bool = Field(default=True, description="Book availability status") class BookCreate(BookBase): class Config: schema_extra = { "example": { "title": "The Great Gatsby", "author": "F. Scott Fitzgerald", "description": "A story of the fabulously wealthy Jay Gatsby", "isbn": "9780743273565", "publication_year": 1925, "publisher": "Scribner", "cover_image": "https://example.com/gatsby.jpg", "price": 1499, "is_available": True } } class Book(BookBase): id: int created_at: datetime updated_at: datetime class Config: orm_mode = True