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JustAPI

Settings and Environment Variables

Basic Settings with Pydantic

Section titled “Basic Settings with Pydantic”
from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    database_url: str = "sqlite:///app.db"
    secret_key: str = "change-me"
    debug: bool = False
    api_prefix: str = "/api/v1"


    class Config:
        env_file = ".env"


settings = Settings()

Using Settings in Your App

Section titled “Using Settings in Your App”
from justapi import JustAPIApp


app = JustAPIApp(title="My App", debug=settings.debug)


@app.get("/config")
def get_config():
    return {
        "debug": settings.debug,
        "api_prefix": settings.api_prefix,
    }

.env File

Section titled “.env File”
.env
DATABASE_URL=postgresql://user:pass@localhost/db
SECRET_KEY=my-production-secret
DEBUG=false
API_PREFIX=/api/v1

Never commit .env files to version control. Add it to .gitignore.

Accessing Environment Variables

Section titled “Accessing Environment Variables”
import os


# Standard library approach
debug = os.getenv("DEBUG", "false").lower() == "true"
database_url = os.getenv("DATABASE_URL", "sqlite:///app.db")

See Also

Section titled “See Also”