php - 调用未定义的方法 MongoDB\Driver\Cursor::current()

Question

我在 PHP 中遇到这个错误:

Fatal error: Uncaught Error: Call to undefined method MongoDB\Driver\Cursor::current()`.

这似乎与 the documentation 矛盾.
我可以显示我的代码，但是，我调用方法 current()对于 MongoDB 游标。

Answer 1

几周前刚刚添加了此功能:

MongoDB\Driver\Cursor has historically only implemented Traversable and provided an internal iterator (not to be to the Iterator userland class). PHP 8 required that we implement either Iterator or IteratorAggregate directly (PHPC-1690), although PHP also provides an internal iterator for extensions to make that easier.

That said, we should consider providing a proper Iterator implementation on the Cursor to remove our reliance on the internal iterator class for PHP 8 and present a consistent API for all supported versions.

https://jira.mongodb.org/browse/PHPC-1691 (2020 年 11 月 4 日决议)
确保您拥有的任何软件包都是最新的，或者 install from source如有必要。