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import psycopg2 | |
import os | |
# PostgreSQLの設定 | |
conn_params = { | |
"dbname": "neondb", | |
"user": os.getenv("postgre_user"), | |
"password": os.getenv("postgre_pass"), | |
"host": os.getenv("postgre_host"), | |
"port": 5432, | |
"sslmode": "require" | |
} | |
def initialize_db(): | |
# PostgreSQLに接続 | |
conn = psycopg2.connect(**conn_params) | |
cursor = conn.cursor() | |
# テーブルを作成するSQL文 | |
create_table_query = """ | |
CREATE TABLE IF NOT EXISTS chat_history ( | |
id SERIAL PRIMARY KEY, | |
role TEXT, | |
type TEXT, | |
content TEXT, | |
timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP | |
) | |
""" | |
cursor.execute(create_table_query) | |
# 別のテーブルを作成するSQL文 | |
create_history_table_query = """ | |
CREATE TABLE IF NOT EXISTS history ( | |
id SERIAL PRIMARY KEY, | |
role TEXT, | |
type TEXT, | |
content TEXT, | |
timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP | |
) | |
""" | |
cursor.execute(create_history_table_query) | |
conn.commit() | |
cursor.close() | |
conn.close() | |
print("データベースとテーブルが作成されました。") | |
def add_message_to_db(role, message_type, content): | |
conn = psycopg2.connect(**conn_params) | |
cursor = conn.cursor() | |
cursor.execute( | |
"INSERT INTO history (role, type, content, timestamp) VALUES (%s, %s, %s, CURRENT_TIMESTAMP)", | |
(role, message_type, content) | |
) | |
conn.commit() | |
cursor.close() | |
conn.close() | |
def get_recent_messages(limit=5): | |
conn = psycopg2.connect(**conn_params) | |
cursor = conn.cursor() | |
cursor.execute( | |
"SELECT role, type, content FROM history ORDER BY timestamp DESC LIMIT %s", | |
(limit,) | |
) | |
messages = cursor.fetchall() | |
cursor.close() | |
conn.close() | |
return messages[::-1] # 最新のlimit件を取得して逆順にする | |
# データベースの初期化 | |
#initialize_db() | |