codesnips

pydantic

python 
from typing import Literal, Tuple, Type

from pydantic import BaseModel, PostgresDsn, RedisDsn
from pydantic_settings import (
    BaseSettings,
    PydanticBaseSettingsSource,

Layered Pydantic Settings: Env Vars Over a YAML Defaults File

pydantic configuration settings
by codesnips 4 tabs
python 
from typing import Any, Optional

from fastapi.responses import JSONResponse
from pydantic import BaseModel

Consistent JSON Error Responses in FastAPI With a Custom Exception Handler

fastapi error-handling exceptions
by codesnips 3 tabs
python 
from typing import List, Optional

from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from .dataloader import DataLoader

Batched DataLoader to Avoid N+1 Queries in FastAPI Responses

fastapi dataloader n-plus-one
by codesnips 3 tabs
python 
from typing import Optional
from pydantic import BaseModel, EmailStr, Field, field_validator, model_validator


class CreateUserRequest(BaseModel):
    model_config = {"extra": "forbid"}

Validating JSON Payloads with Pydantic v2 and Returning Field-Level Errors in FastAPI

fastapi pydantic validation
by codesnips 3 tabs
python 
import base64
import json
from datetime import datetime
from typing import Optional, Tuple

Opaque Cursor Pagination for FastAPI Endpoints with SQLAlchemy

fastapi sqlalchemy pagination
by codesnips 3 tabs
python 
from datetime import datetime

from pydantic import BaseModel


class UserV1(BaseModel):

Versioning a FastAPI API With APIRouter Mounted Under /v1 and /v2 Prefixes

fastapi api-versioning apirouter
by codesnips 4 tabs
python 
from datetime import datetime, timedelta, timezone

from fastapi.security import OAuth2PasswordBearer
from jose import jwt
from passlib.context import CryptContext

Reusable OAuth2 Password Bearer JWT Authentication Dependency in FastAPI

fastapi oauth2 jwt
by codesnips 4 tabs
python 
from datetime import datetime, timedelta, timezone

from jose import jwt, JWTError
from jose.exceptions import ExpiredSignatureError

SECRET_KEY = "change-me-in-production"

FastAPI JWT Authentication with Access/Refresh Tokens and a Verification Dependency

fastapi jwt authentication
by codesnips 3 tabs
python 
from datetime import date, datetime
from decimal import Decimal, InvalidOperation
from enum import Enum

from pydantic import BaseModel, field_validator

Parsing and Normalizing a Transactions CSV into Typed Records with Pydantic

csv pydantic data-parsing
by codesnips 2 tabs
python 
import enum
import datetime as dt

from sqlalchemy import Column, Integer, String, BigInteger, Enum, DateTime
from sqlalchemy.orm import declarative_base

Streaming FastAPI File Uploads with a Background Validation Task

fastapi uploads background-tasks
by codesnips 3 tabs
python 
import hmac
import hashlib
import time
from fastapi import Request, HTTPException, status

Verifying Stripe Webhook Signatures With a Reusable FastAPI Dependency

fastapi webhooks security
by codesnips 3 tabs
python 
from enum import Enum
from typing import Optional

from fastapi import Query
from pydantic import BaseModel, Field, field_validator

Validate and Normalize Query Filters With a Pydantic Dependency in FastAPI

fastapi pydantic validation
by codesnips 3 tabs