Question

在带有Mongoose的Node中我想在集合Content中找到一个对象。它有一个名为users的子文档列表，其中包含stream，user和added属性。我这样做是为了在_id字段中获取具有特定用户users.user属性的所有文档。

Content.find( { 'users.user': user._id } ).sort( { 'users.added': -1 } )

这似乎有效（虽然我不确定.sort是否真的在这里工作。但是，我想匹配两个字段，如下所示：

Content.find( { 'users.user': user._id, 'users.stream': stream } } ).sort( { 'users.added': -1 } )

这似乎不起作用。这样做的正确方法是什么？

这是一个示例文档

{
    "_id" : ObjectId("551c6b37859e51fb9e9fde83"),
    "url" : "https://www.youtube.com/watch?v=f9v_XN7Wxh8",
    "title" : "Playing Games in 360°",
    "date" : "2015-03-10T00:19:53.000Z",
    "author" : "Econael",
    "description" : "Blinky is a proof of concept of enhanced peripheral vision in video games, showcasing different kinds of lens projections in Quake (a mod of Fisheye Quake, using the TyrQuake engine).\n\nDemo and additional info here:\nhttps://github.com/shaunlebron/blinky\n\nThanks to @shaunlebron for making this very interesting proof of concept!\n\nSubscribe: http://www.youtube.com/subscription_center?add_user=econaelgaming\nTwitter: https://twitter.com/EconaelGaming",
    "duration" : 442,
    "likes" : 516,
    "dislikes" : 13,
    "views" : 65568,
    "users" : [ 
        {
            "user" : "54f6688c55407c0300b883f2",
            "added" : 1427925815190,
            "_id" : ObjectId("551c6b37859e51fb9e9fde84"),
            "tags" : []
        }
    ],
    "images" : [ 
        {
            "hash" : "1ab544648d7dff6e15826cda7a170ddb",
            "thumb" : "...",
            "orig" : "..."
        }
    ],
    "tags" : [],
    "__v" : 0
}

Answer 1

使用$ elemMatch运算符为嵌入文档数组指定多个条件：

Content.find({"users": {$elemMatch: {"user": user.id, "stream": stream}}});

查找包含两个（或更多）属性的子文档的文档

1 个答案: