以下代码运行无任何错误，但记录未插入表中

Question

import pymysql


db_host = "localhost"
db_name = "mydatabse"
table_name = "Student"
db_user = "root"
db_pass = "745269"

query_insert = "INSERT INTO " + table_name + " (stu_id, stu_name) VALUES (%s, %s) "


class Student:
    id = 0
    name = ""

    def __init__(self, sid, name):
        self.id = sid
        self.name = name


def insert_record(rec):
    #print((rec.id, rec.name))
    con = pymysql.connect(host=db_host, user=db_user, password=db_pass, database=db_name)
    cur = con.cursor()
    cur.execute(query_insert, (rec.id, rec.name))
    #$cur.execute("INSERT INTO Student VALUES (%s, %s)", (3, 'Qwerty'))


r1 = Student(3, "Qwerty")
insert_record(r1)

我正在尝试使用pymysql模块将新行插入数据库。我打算像INSERT一样全局定义所有查询。我想我缺少查询的某些格式，但到目前为止仍无法指出。任何帮助都将受到感激。

Answer 1

根据https://pymysql.readthedocs.io/en/latest/user/examples.html，“默认情况下，连接不会自动提交。因此，您必须提交以保存更改。”

将导致：

import pymysql


db_host = "localhost"
db_name = "mydatabse"
table_name = "Student"
db_user = "root"
db_pass = "745269"

query_insert = "INSERT INTO " + table_name + " (stu_id, stu_name) VALUES (%s, %s) "


class Student:
    id = 0
    name = ""

    def __init__(self, sid, name):
        self.id = sid
        self.name = name


def insert_record(rec):
    #print((rec.id, rec.name))
    con = pymysql.connect(host=db_host, user=db_user, password=db_pass, database=db_name)
    cur = con.cursor()
    cur.execute(query_insert, (rec.id, rec.name))
    #$cur.execute("INSERT INTO Student VALUES (%s, %s)", (3, 'Qwerty'))
    con.commit()  # Added this commit call


r1 = Student(3, "Qwerty")
insert_record(r1)