从Flask python插入数据后，SQLite数据库未更新

from flask import Flask, request
import sqlite3

app = Flask(__name__)

@app.route('/insert', methods=['POST'])
def insert_data():
    data = request.form['data']
    conn = sqlite3.connect('database.db')
    cursor = conn.cursor()
    cursor.execute("INSERT INTO table_name (column_name) VALUES (?)", (data,))
    conn.commit()  # 提交事务
    conn.close()
    return 'Data inserted successfully'

if __name__ == '__main__':
    app.run()

conn.close()  # 关闭数据库连接

conn = sqlite3.connect('/path/to/database.db')  # 绝对路径
conn = sqlite3.connect('database.db')  # 相对路径

sqlite3 database.db
.schema table_name  # 查看表结构