models.py

from pydantic import BaseModel, EmailStr, Field, field_validator
from typing import Optional

class User(BaseModel):
    id: int
    name: str = Field(..., min_length=1, max_length=50)
    email: EmailStr
    age: Optional[int] = Field(None, ge=18)
    active: bool = True

class UserCreate(BaseModel):
    name: str = Field(..., min_length=1, max_length=50)
    email: EmailStr
    age: Optional[int] = Field(None, ge=18)



class UserUpdate(BaseModel):
    name: Optional[str] = None
    email: Optional[EmailStr] = None  # Mark email as optional
    age: Optional[int] = None
    active: Optional[bool] = None  # Mark active as optional

    @field_validator('name')
    def validate_name(cls, value):
        if value is not None and not (1 <= len(value) <= 50):
            raise ValueError("Name must be between 1 and 50 characters")
        return value

    @field_validator('age')
    def validate_age(cls, value):
        if value is not None and value < 18:
            raise ValueError("Age must be at least 18")
        return value