用猫鼬从[对象数组]查询

Question

我有两个定义如下的Mongo模式：

var userSchema = new mongoose.Schema({
    email: String,
    password: String, //hash created from password
    firstName: String,
    lastName: String,
    comment:{userComment:String,adminComment:String},
    postalAddress: String,
    city: String,
    state: String,
    country: String,
    institution: String,
    privilege: {type: String, enum:['normal','chair','admin']},
    status: {type:String, enum: ['granted','removed','pending']},
    myConference:[{type:Schema.Types.ObjectId,ref:'Conference'}],
    mySubmission:[{type:Schema.Types.ObjectId,ref:'Submission'}]
});

var conferenceSchema = new mongoose.Schema({
    conferenceTitle: {type:String},
    conferenceDescription: String,
    conferenceStartDate:{type:Date, default: Date.now},
    submissionEndDate:{type:Date},
    reviewEndDate:{type:Date},
    **conferenceMembers:[{type:Schema.Types.ObjectId,ref:'User'}]**,
    conferenceSubmissions:[{type:Schema.Types.ObjectId,ref:'Submission'}],
    createdBy:{type:Schema.Types.ObjectId,ref:'User'},
    //chairMembers:[{type:Schema.Types.ObjectId,ref:'User'}],
    department:String
});

要求：我想获取所有与某个_id匹配的会议对象，即每个“用户”模式对象唯一的_id。 ConferenceMembers是“用户”对象的数组

我做了什么：

这是一个POST：

var userId=req.body.userId

**Conference.find({userId: {$in: [Conference.conferenceMembers]}},function(err,conf){**
if(err){
                return res.send(500, err);
            }
return res.send(200,conf);

但是，过滤器似乎在这里不起作用，我也尝试了$ elemMatch，但是没有运气。

Answer 1

要在conferenceMembers获取所有具有特定userId的文档，您可以执行以下操作：

Conference.find({conferenceMembers : userId}).exec(function(err,conf){...});

如果您也想填充用户，则可以使用猫鼬填充。

Conference.find({conferenceMembers : userId}).populate('conferenceMembers').exec(function(err,conf){...});