37 lines
1.1 KiB
Python
37 lines
1.1 KiB
Python
import os
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import psycopg2
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from psycopg2 import sql
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def connect():
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"""Подключение к БД. Возвращает connection или None."""
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try:
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return psycopg2.connect(
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host=os.getenv("DB_HOST"),
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port=os.getenv("DB_PORT", 5432),
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dbname=os.getenv("DB_NAME"),
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user=os.getenv("DB_USER"),
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password=os.getenv("DB_PASS"),
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sslmode=os.getenv("DB_SSLMODE", "disable"),
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)
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except Exception:
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return None
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def query(sql_text, params=None):
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"""Выполнить запрос, вернуть (rows, columns) или (None, error)."""
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conn = connect()
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if not conn:
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return None, "no connection"
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try:
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cur = conn.cursor()
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cur.execute(sql_text, params)
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rows = cur.fetchall()
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cols = [desc[0] for desc in cur.description] if cur.description else []
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cur.close()
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conn.close()
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return {"columns": cols, "rows": [list(r) for r in rows]}, None
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except Exception as e:
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conn.close()
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return None, str(e)
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