带有 FullCalendar 的 MySQL 正在写入 SQL 数据库，但无法正确读取/更新

问题描述

我正在尝试构建一个允许调度程序与 sql 数据库交互的 Web 应用程序。

它能够将输入的事件存储到服务器，但尽管存在于数据库中，但不会显示给应用程序。

这是我的代码，用于编写和更新在离开“POST”函数后返回错误的事件。

@app.route("/insert",methods=["POST","GET"])
def insert():
    print("before")
    cursor = MysqL.connection.cursor()
    cur = MysqL.connection.cursor(MysqLdb.cursors.DictCursor)
    print("after")
    if request.method == 'POST':
        title = request.form['title'] 
        start = request.form['start']
        end = request.form['end']
        print(title)
        print(start)
        cur.execute("INSERT INTO events (title,start,end) VALUES (%s,%s,%s)",[title,end])
        print ('pre committ')
        MysqL.connection.commit()
        print('post commit')
        cur.close()
        msg = 'success'
        print('done')

这是更新，当我单步执行代码时，这不会运行。

@app.route("/update","GET"])
def update():
    print("in commit")
    cursor = MysqL.connection.cursor()
    cur = MysqL.connection.cursor(MysqLdb.cursors.DictCursor)
    if request.method == 'POST':
        title = request.form['title']
        start = request.form['start']
        end = request.form['end']
        id = request.form['id']

        print(title)
        print(start)
        cur.execute("UPDATE events SET title = %s,start = %s,end = %s WHERE id = %s ",end,id])
        MysqL.connection.commit()
        cur.close()
        msg = 'success'
    return jsonify(msg)

这是终端输出的内容：

before
after
Test event
2021-07-14 07:30:00
pre committ
post commit
done
[2021-07-14 15:06:01,333] ERROR in app: Exception on /insert [POST]
Traceback (most recent call last):
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\lib\site-packages\flask\app.py",line 2447,in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\lib\site-packages\flask\app.py",line 1953,in full_dispatch_request
    return self.finalize_request(rv)
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\lib\site-packages\flask\app.py",line 1968,in finalize_request
    response = self.make_response(rv)
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\lib\site-packages\flask\app.py",line 2097,in make_response
    raise TypeError(
TypeError: The view function did not return a valid response. The function either returned None or ended without a return statement.
127.0.0.1 - - [14/Jul/2021 15:06:01] "←[35m←[1mPOST /insert HTTP/1.1←[0m" 500 -
Error on request:
Traceback (most recent call last):
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\Lib\site-packages\werkzeug\serving.py",line 323,in run_wsgi
    execute(self.server.app)
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\Lib\site-packages\werkzeug\serving.py",line 312,in execute
    application_iter = app(environ,start_response)
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\Lib\site-packages\flask\app.py",line 2464,in __call__
    return self.wsgi_app(environ,line 2458,in wsgi_app
    ctx.auto_pop(error)
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\Lib\site-packages\flask\ctx.py",line 452,in auto_pop
    self.pop(exc)
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\Lib\site-packages\flask\ctx.py",line 438,in pop
    app_ctx.pop(exc)
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\Lib\site-packages\flask\ctx.py",line 238,in pop
    self.app.do_teardown_appcontext(exc)
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\Lib\site-packages\flask\app.py",line 2321,in do_teardown_appcontext
    func(exc)
  File "C:\Users\samue\source\repos\Oper Fast WebApp-V1\Webenv\Lib\site-packages\flask_MysqLdb\__init__.py",line 100,in teardown
    ctx.MysqL_db.close()
MysqLdb._exceptions.OperationalError: (2006,'')

解决方法

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