Mongodb 仅检索对象数组中查询的元素

我有一个组织的收藏。每个组织都有成员。我想运行查询来检查用户是否是该组织的成员

// Use findOne so that it returns one document instead of a collection
mongoose.model('organization').findOne({
    // Instead of querying twice, just set both conditions
    'orgId': paramOrgId,
    'members.user':req.user._id
}, 
'_id', // We'll just select the _id field. We don't need the whole organization document
function (err, org) {
    if (err)  
        return res.send(500); // Error!

    if (org) 
        return res.send(200);
    else
        return res.send(401);
});

我试过这个：

mongoose.model('organization').find({orgId: paramOrgId}, function(err, organization){
      organization.find({'members.user':req.user._id}, function(err, user){
        if(!user) res.send(401) //The user is not a member in organization

        if(user) res.send(200);

      });

    }
    return res.send(401);
  });

很明显，您在回拨时没有“查找”。我应该怎么做呢

组织文档示例：

> db.organizations.find().forEach(printjson);
{
    "_id" : ObjectId("5381d5d11409f125475fcc90"),
    "orgId" : 5,
    "title" : "ExampleCorp",
    "members" : [
        {
            "tier" : 1,
            "user" : ObjectId("5381d5d11409f125475fcc8c")
        },
        {
            "tier" : 2,
            "user" : ObjectId("5381d5d11409f125475fcc8d")
        },
        {
            "tier" : 3,
            "user" : ObjectId("5381d5d11409f125475fcc8e")
        }
    ]
}

---

如果您只想检查某个用户是否是某个组织的成员，则可以在一个查询中找到它

// Use findOne so that it returns one document instead of a collection
mongoose.model('organization').findOne({
    // Instead of querying twice, just set both conditions
    'orgId': paramOrgId,
    'members.user':req.user._id
}, 
'_id', // We'll just select the _id field. We don't need the whole organization document
function (err, org) {
    if (err)  
        return res.send(500); // Error!

    if (org) 
        return res.send(200);
    else
        return res.send(401);
});

---

您是否可以编辑您的问题以包含示例

组织

文档？我认为这只能在单个查询中完成。看到这个了吗