Question

我有一个数据库class，如：

rlock = RLock()
class PostgresDB:
    host = Settings.DB_HOST
    name = Settings.DB_NAME
    username = Settings.DB_USERNAME
    pwd = Settings.DB_PWD

    def __init__(self):
        self.con = None

    def _create_connection(self):
        if self.con is None or self.con.closed:
            self.con = psycopg2.connect("host={h} dbname={n} user={u} password={p}".format(
                h=self.host, n=self.name, u=self.username, p=self.pwd,
                cursor_factory=RealDictCursor))

    @contextlib.contextmanager
    def reading_cursor(self, sql, params=None):
        rlock.acquire()
        self._create_connection()
        try:
            cur = self.con.cursor()
            cur.execute(sql, params)
            yield cur
        except DatabaseError as e:
            traceback.print_exc()
            yield Exception()
        finally:
            self.con.close()
        rlock.release()

    @contextlib.contextmanager
    def writing_cursor(self, sql, params=None):
        rlock.acquire()
        self._create_connection()
        try:
            cur = self.con.cursor()
            cur.execute(sql, params)
            yield cur
            self.con.commit()
        except DatabaseError as e:
            traceback.print_exc()
            yield Exception()

        finally:
            self.con.close()
            rlock.release()

请注意，我明确要求RealDictCursor。但是，当完成任何请求时，结果是tuples的列表，而不是dicts。我不确定我错过了什么？

Answer 1

好的，这是非常愚蠢的...如果仔细观察，你会看到我将else传递给cursor_factory，而不是将其传递给.format() ......

游标工厂参数无效

1 个答案: