用貓鼬從[對象數組]查詢

Question

我有兩個定義如下的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：我想獲取所有與某個_id匹配的會議對象，即每個“用戶”模式對象唯一的_id。 ConferenceMembers是“用戶”對象的數組

我做了什么：

這是一個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，過濾器似乎在這里不起作用，我也嘗試了$ elemMatch，但是沒有運氣。

Answer 1

要在conferenceMembers獲取所有具有特定userId的文檔，您可以執行以下操作：

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

如果您也想填充用戶，則可以使用貓鼬填充。

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