Question

我使用下面的课程，我可以使用＆＃34; getAccount＆＃34;成功检索数据。方法，但＆＃34; insertToken＆＃34;方法不插入数据。我手动尝试了SQL，它确实有用。我也没有收到任何错误。知道这里有什么问题吗？

import psycopg2
import psycopg2.extras

class Database:
    variable = "blah"

    def getAccount(self):
        accountId = 0;
        username = ""
        password = ""
        try:
            conn = psycopg2.connect("dbname='token_generator' user='token_generator' host='myip' password='mypass'")
            cur = conn.cursor()
            try:
                cur.execute("""SELECT id, username, password from account where used = false limit 1""")
            except Exception as e: print(e)
            rows = cur.fetchall()
            for row in rows:
                accountId = row[0]
                username = row[1]
                password = row[2]
        except:
            print("I am unable to connect to the database")
        return (accountId, username, password)


    def insertToken(self, token, accountId):
        try:
            conn = psycopg2.connect("dbname='token_generator' user='token_generator' host='myip' password='mypass'")
            cur = conn.cursor()
            try:
                cur.execute("INSERT INTO token (token, account_id) VALUES (%s, %s)", (token, accountId))
            except Exception as e: print(e)
        except:
            print("I am unable to connect to the database")

Answer 1

在插入提交事务后你是在做conn.commit()吗？此外，您在某些时候还需要cur.close() conn.close()来干净地关闭事物。

您还可以使用autocommit模式。正如Jared的评论指出，使用上下文管理器代替try/catch会更清晰。

with psycopg2.connect("dbname='token_generator' user='token_generator' host='myip' password='mypass'") as conn:
    conn.autocommit = True
    with conn.cursor() as cur:
        try:
            cur.execute("INSERT ...")
        except Exception as exc:
            print("Error executing SQL: %s"%exc)

Answer 2

SELECT * FROM token_generator.pg_stat_activity

应该为您提供最近查询的列表。

如果您认为自己运行的查询是手动运行的，那么您很可能无法运行您认为自己正在运行的查询。这可以帮助您确定您实际运行的查询，然后相应地进行更改。

psycopg2没有错误但没有插入到DB中

2 个答案: