Kita Trofimov
61 lines
1.8 KiB
Python
61 lines
1.8 KiB
Python
import psycopg2
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import os
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import logging
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from contextlib import contextmanager
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from typing import Generator
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from utils.loadDotEnv import initializeENV
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initializeENV()
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logger = logging.getLogger(__name__)
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def PSQLConnect():
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conn = psycopg2.connect(os.getenv('POSTDRESS_CONNECTION'))
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return conn
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def PSQLCursor(conn):
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cur = conn.cursor()
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return cur
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@contextmanager
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def get_connection() -> Generator[psycopg2.extensions.connection, None, None]:
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conn = None
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try:
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conn = PSQLConnect()
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logger.debug("Подключение к БД установлено")
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yield conn
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except psycopg2.OperationalError as e:
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logger.error(f"Ошибка подключения к БД: {e}")
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raise
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except psycopg2.Error as e:
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logger.error(f"Ошибка PostgreSQL: {e}")
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raise
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except Exception as e:
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logger.error(f"Неожиданная ошибка при работе с БД: {e}")
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raise
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finally:
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if conn:
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try:
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conn.close()
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logger.debug("Соединение с БД закрыто")
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except Exception as e:
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logger.warning(f"Ошибка при закрытии соединения: {e}")
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def test_connection() -> bool:
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try:
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with get_connection() as conn:
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cur = PSQLCursor(conn)
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try:
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cur.execute("SELECT version();")
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version = cur.fetchone()
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logger.debug(f"Версия PostgreSQL: {version[0]}")
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return True
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finally:
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cur.close()
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logger.debug("Курсор закрыт")
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except Exception as e:
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logger.error(f"Тест подключения к БД провален: {e}")
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return False
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print(test_connection()) |