settings.py

from typing import Annotated

from pydantic_settings import BaseSettings, SettingsConfigDict
from pydantic import Field, PostgresDsn, computed_field


class Settings(BaseSettings):
    model_config = SettingsConfigDict(
        env_file=".env", env_ignore_empty=True, extra="ignore"
    )

    POSTGRES_SERVER: str = Field(..., env="POSTGRES_SERVER")
    POSTGRES_PORT: int = Field(..., env="POSTGRES_PORT")
    POSTGRES_USER: str = Field(..., env="POSTGRES_USER")
    POSTGRES_PASSWORD: str = Field(..., env="POSTGRES_PASSWORD")
    POSTGRES_DB: str = Field(..., env="POSTGRES_DB")

    @computed_field
    @property
    def sqlalchemy_database_uri(self) -> PostgresDsn:
        return PostgresDsn.build(
            scheme="postgresql+psycopg",
            username=self.POSTGRES_USER,
            password=self.POSTGRES_PASSWORD,
            host=self.POSTGRES_SERVER,
            port=self.POSTGRES_PORT,
            path=self.POSTGRES_DB,
        )


# Использование
settings = Settings()