为什么在 SQL 中删除 PYTHON 中的查询不提交数据库中的更改？

Question

DELETE FROM ... 不起作用。正确的参数传递给函数。不会返回任何错误。

我试过修改路由，POST和GET传参，哭得像胎一样

conn = mysql.connect()
cursor = mysql.connect().cursor()
cursor.execute("SELECT * FROM food_on_the_table WHERE table_id = %s", table_id) 
food_on_the_table = cursor.fetchall()
records = cursor.fetchall() 
cursor.execute("DELETE FROM food_on_the_table WHERE row_id = %s", row_id)   
conn.commit()
result = cursor.rowcount
message = "rows affected " + str(result)    
cursor.close()

没有从数据库中删除任何行。 row_i 是对的，rows affected = 1 符合预期。

Answer 1

试试这个，

try:
    conn = mysql.connect()
    with conn.cursor() as cursor:
        cursor.execute("SELECT * FROM food_on_the_table WHERE table_id = %s", table_id)
        food_on_the_table = cursor.fetchall()
        records = food_on_the_table 
    with conn.cursor() as cursor:
        cursor.execute("DELETE FROM food_on_the_table WHERE row_id = %s", row_id)

    conn.commit()

finally:
    conn.close()

为什么在 SQL 中删除 PYTHON 中的查询不提交数据库中的更改？

why delete in SQL query in PYTHON doesn't commit changes in database?

python

mysql

delete-row

flask

python-3.x