73 lines
2.7 KiB
Python
73 lines
2.7 KiB
Python
# Database configuration package
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from pydantic import BaseModel
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import re
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import os
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import urllib.parse
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class Settings(BaseModel):
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DB_HOST: str = os.getenv("DB_HOST", "postgres")
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DB_PORT: int = int(os.getenv("DB_PORT", "5432"))
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DB_USER: str = os.getenv("DB_USER", "postgres")
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DB_PASS: str = os.getenv("DB_PASS", "")
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DB_NAME: str = os.getenv("DB_NAME", "profi")
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@classmethod
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def validate_db_port(cls, v):
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# Проверка и преобразование DB_PORT
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if isinstance(v, str):
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# Используем регулярное выражение для извлечения целого числа
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match = re.search(r'\d+', v)
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if match:
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return int(match.group())
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else:
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raise ValueError(f"Invalid DB_PORT value: {v}")
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return v
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@property
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def DATABASE_URL_asyncpg(self) -> str:
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pwd = urllib.parse.quote_plus(str(self.DB_PASS))
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return f"postgresql+asyncpg://{self.DB_USER}:{pwd}@{self.DB_HOST}:{self.DB_PORT}/{self.DB_NAME}"
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@property
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def DATABASE_URL_syncpg(self) -> str:
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pwd = urllib.parse.quote_plus(str(self.DB_PASS))
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return f"postgresql+pg8000://{self.DB_USER}:{pwd}@{self.DB_HOST}:{self.DB_PORT}/{self.DB_NAME}"
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@property
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def PG8000_CONNECT_ARGS(self) -> dict:
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"""connect_args для pg8000 — отключаем SSL (сервер его не поддерживает)."""
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return {"ssl_context": None}
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def make_engine():
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"""Создаёт SQLAlchemy engine с правильными параметрами для pg8000."""
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from sqlalchemy import create_engine
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s = Settings()
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return create_engine(
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s.DATABASE_URL_syncpg,
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connect_args=s.PG8000_CONNECT_ARGS,
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future=True,
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pool_pre_ping=True, # проверяет соединение перед каждым запросом
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)
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def wait_for_db(retries: int = 15, delay: float = 2.0) -> None:
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"""Ждёт, пока PostgreSQL станет доступен. Вызывается при старте приложения."""
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import time
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import logging
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from sqlalchemy import text
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logger = logging.getLogger("bd")
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engine = make_engine()
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for attempt in range(1, retries + 1):
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try:
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with engine.connect() as conn:
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conn.execute(text("SELECT 1"))
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logger.info("PostgreSQL is ready.")
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return
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except Exception as exc:
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logger.warning("DB not ready (attempt %d/%d): %s", attempt, retries, exc)
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if attempt < retries:
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time.sleep(delay)
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raise RuntimeError("PostgreSQL did not become ready in time.")
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