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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()