javascript - 我如何在 RethinkDB 中取消订阅 'changefeed'？

Question

我知道我可以订阅以收听执行此操作的表上的更改

r.table('users').changes().run(conn, function(err, cursor) {
  cursor.each(console.log);
});

但是，我怎样才能停下来聆听这些变化呢？我如何取消订阅此更改？

Answer 1

您可以只调用cursor.close()，(或者您可以执行conn.close())

来自docs for cursor.close :

r. Closing a cursor cancels the corresponding query and frees the memory associated with the open request.

此外，关闭连接本身将自动关闭与连接关联的所有游标。换句话说，如果您正确关闭连接，通常不需要显式关闭游标。

来自connection.close docs:

Closing a connection normally waits until all outstanding requests have finished and then frees any open resources associated with the connection. By passing false to the noreply_wait optional argument, the connection will be closed immediately, possibly aborting any outstanding noreply writes.