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# Basic configuration
logging.basicConfig(
    level=logging.DEBUG,
    format="%(asctime)s - %(levelname)s - %(name)s - %(funcName)20s() on line %(lineno)s - %(message)s",
    # datefmt="%Y-%m-%d %H:%M:%S.%f %Z%z",
    handlers=[stream_handler],
)

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Alembic

Custom file name template

# alembic.ini
file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s

Overide sqlalchemy database url from config file

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FIREBASE_JWKS_PUBLIC_KEYS = 'https://www.googleapis.com/robot/v1/metadata/x509/[email protected]'

keys_cache = {'keys': None, 'last_fetched': 0.0}


async def fetch_public_keys() -> dict[str, str]:
    """Fetch Firebase public keys from URL, with caching for 1 hour."""

    # Check if the cache is older than 1 hour (3600 seconds)

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Using MongoDB BSON ObjectId with Pydantic (FastAPI, pymongo or motor)

The important part here is when_used="json". This allows the serialization of data (ObjectId) as a string with FastAPI, while also ensuring that model_dump() retains the ObjectId for MongoDB. Not just for _id, but for every reference with ObjectId.

PyObjectId

from typing import Annotated, Any
from bson import ObjectId

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MongoDB Docker Single Node ReplicaSet

Javascript ReplicaSet init script

IMPORTANT: There is an issue with the official MongoDB Compass client. When you try to connect to a ReplicaSet, it first correctly translates the MongoDB connection string (DNS) to localhost:PORT. However, once it reads the member hostnames (like in this script), it will attempt to connect to those hosts instead!

Usualy, the script would look like this:

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Python boto3 AWS S3 chunked async upload

This is a working example of how to asynchronously upload chunks to an AWS S3 bucket using Python. We should modify or optimize the code to suit our needs. For example, we can use a generator to yield chunks of the file instead of loading the entire file into memory.

.env

AWS_ACCESS_KEY_ID=
AWS_SECRET_ACCESS_KEY=
AWS_S3_REGION_NAME=eu-central-1

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Verify Firebase JWT token with 3rd party (PyJWT)

import logging
from typing import Annotated, Any

from fastapi import Depends
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
from jwt import PyJWKClient