"/home/yossef/notes/full-stack/python-backend/fastapi/curd_sql/scheme.md"

path: full-stack/python-backend/fastapi/curd_sql/scheme.md

- **fileName**: scheme
- **Created on**: 2025-04-15 17:08:56

starting for the curd system with scheme using pydantic

"""
so now why creating scheme for specify the response type from server
and specific the structure for tables in db and project
"""

from typing import List, Optional
from pydantic import BaseModel

class ItemBase(BaseModel):
    title: str
    ## having  a default value with None and Optional provide by user
    description: Optional[str] = None

class ItemCreate(ItemBase):
    pass

class Item(ItemBase):
    id: int
    # for owner when create relationship between items and users
    owner_id: int
   
   ## Enables ORM Integration: This setting tells Pydantic that the model 
   ## should be able to be created from and converted to objects originating
   ## from an ORM (like SQLAlchemy or Django ORM).
    class config:
        orm_config = True

class UserBase(BaseModel):
    email: str

class UserCreate(UserBase):
    password: str

class User(UserCreate):
    id: int
    is_active: bool
    ## gone have a list from type Item 
    items: List[Item] = []


    class config:
        orm_config = True


# user response value from request
class UserResponse(UserBase):
    id: int
    hash_password: str
    is_active: bool

pydantic reference(BaseModel): pydantic

continue:./database.md
before:./startup.md