如何利用MySQL和Python开发一个简单的在线问答系统

import mysql.connector
from flask import Flask, request, JSONify

app = Flask(__name__)

# 连接MySQL数据库
db = mysql.connector.connect(
    host="localhost",
    user="root",
    passWord="123456",
    database="qa_system"
)

@app.route("/questions", methods=["GET"])
def get_questions():
    cursor = db.cursor()
    cursor.execute("SELECT * FROM questions")
    questions = cursor.fetchall()

    results = []
    for row in questions:
        question = {
            "id": row[0],
            "title": row[1],
            "content": row[2],
            "create_time": row[3]
        }
        results.append(question)

    return jsonify(results)

@app.route("/questions", methods=["POST"])
def create_question():
    data = request.json
    title = data["title"]
    content = data["content"]

    cursor = db.cursor()
    cursor.execute("INSERT INTO questions (title, content) VALUES (%s, %s)", (title, content))
    db.commit()

    return jsonify({"message": "Question created"})

@app.route("/questions/<int:question_id>/answers", methods=["GET"])
def get_answers(question_id):
    cursor = db.cursor()
    cursor.execute("SELECT * FROM answers WHERE question_id = %s", (question_id,))
    answers = cursor.fetchall()

    results = []
    for row in answers:
        answer = {
            "id": row[0],
            "question_id": row[1],
            "content": row[2],
            "create_time": row[3]
        }
        results.append(answer)

    return jsonify(results)

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