将新值推送到mongodb内部数组-mongodb/php [英] push new value to mongodb inner array - mongodb/php

问题描述

我在mongo中有此文档:

i have this document in mongo:

{
   "_id": ObjectId("4d0b9c7a8b012fe287547157"),
   "done_by": ["1"]
}

并且我想在"done_by"字段中添加另一个值，所以我期望的文档将是:

and i want to add another value to "done_by" field, so my expected document will be::

{
   "_id": ObjectId("4d0b9c7a8b012fe287547157"),
   "done_by": ["1","2","3"]
}

我试试这个:

$conn = new Mongo();
$q = $conn->server->gameQueue;
$id = new MongoId("4d0b9c7a8b012fe287547157");
$q->update(array("_id"=>$id),array('$push' => array("done_by","2")));

但是没有任何反应，有人知道该怎么做吗?

but nothing happens, anyone know how to do this?

推荐答案

由于这些答案都没有真正告诉您这里出了什么问题...

Since neither of these answers are actually telling you what's wrong here ...

$conn = new Mongo();
$q = $conn->server->gameQueue;
$id = new MongoId("4d0b9c7a8b012fe287547157");
$q->update(array("_id"=>$id),array('$push' => array("done_by","2")));

您的 $ push 语句存在问题，您没有在实际发送"done_by" 和的情况下推送值"2"的"done_by" 2"...

There is a problem with your $push statement, you are not pushing "done_by" with a value of "2" you are actually sending "done_by" and "2" ...

这是问题所在...

array('$push' => array("done_by","2"))

这应该是 => 而不是

array('$push' => array("done_by" => "2"))

但是，请注意，每次运行此命令时，如果希望MongoDB仅插入"2"(如果在"done_by"中尚不存在)，它将插入另一个"2"，则应使用 $ addToSet ...

However, note that every time you run this it will insert another "2" if you want MongoDB to only inset "2" if it doesn't already exist in "done_by" then you should use $addToSet ...

array('$addToSet' => array("done_by" => "2"))

此语句不会每次只加2.

This statement won't add 2 everytime, only the first time.

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