{ type: mongoose.Schema.Types.ObjectId, ref: `User` } ] } ) EXPRESS ROUTE CODE const existingConvo = await Conversation.findOne({ participants: { $elemMatch: [msg.senderId, msg.recId] }, // ^ Query filter must be an object, got an array }) $elemMatch,因为您需要participants数组包含...
mongoose提供如下的crud方法savefind | findOneupdateremove下面我们使用user模型为例，给出具体例子增加(Create)文档Model#save(product,)@description Saves this document.Parameters:- product, <function(err, > Number)} [fn] optional callbackReturns: <Promise> Promise具体代码const user = new User({ us...
[<array_of_ids>] } } 如果要用动态值更新多个文档,则此方法可行: const docs = await docsModel.find({});docs.forEach(function(doc) { await docsModel.updateOne({ _id: doc._id }, { $set: { field_I_want_to_update: "new_dynamic_value" } });}); 与您的情况相比,您缺少<filter>...
updated:Date,age:Number,mixed:Schema.Types.Mixed,//该混合类型等同于nested_id:Schema.Types.ObjectId,//主键_fk:Schema.Types.ObjectId,//外键array:[],arrOfString:[String],arrOfNumber:[Number],arrOfDate:[Date],arrOfBuffer:[Buffer],arrOfBoolean:[Boolean],arrOfMixed:[Schema.Types.Mixed],arrOf...
Schema.Types.ObjectId,//外键array:[],//数组arrOfString:[String],//字符串数组arrOfNumber:[Number],//数字数组arrOfDate:[Date],//日期数组arrOfBuffer:[Buffer],//Buffer数组arrOfBoolean:[Boolean],//布尔值数组arrOfObjectId:[Schema.Types.ObjectId]//对象ID数组nested:{//内嵌文档name:String, }...
{ type: Number, min: 18, max: 65 }, mixed: Schema.Types.Mixed, _someId: Schema.Types.ObjectId, array: [], ofString: [String], ofNumber: [Number], ofDates: [Date], ofBuffer: [Buffer], ofBoolean: [Boolean], ofMixed: [Schema.Types.Mixed], ofObjectId: [Schema.Types.ObjectId]...
Schema.Type是Mongoose内部定义的数据类型。基本类型有:String、Number、Date、Boolean、Array、Buffer、Mixed、ObjectId。 Mixed 混合数据类型,可以直接定义{}来使用,以下两种形式等价。 new Schema({mixed: {Schema.Types.Mixed} }); new Schema({mixed: {} }); ...
Types.ObjectId], ofArrays: [[]], ofArrayOfNumbers: [[Number]], nested: { stuff: { type: String, lowercase: true, trim: true } }, map: Map, mapOfString: { type: Map, of: String } }); // example use const Thing = mongoose.model('Thing', schema); const m = new Thing; ...
friends: [{ type: ObjectId, ref: 'User' }] }); User. findOne({ name: 'Val' }). populate({ path: 'friends',//查询我的朋友 // Get friends of friends - populate the 'friends' array for every friend populate: { path: 'friends' }//查询我朋友的朋友列表 ...
findByName('krouky',function(err,persons){ //找到所有名字叫krouky的人 }); 2.3 索引 索引或者复合索引能让搜索更加高效,默认索引就是主键索引ObjectId,属性名为_id, 索引会作为一个专题来讲解 2.4 虚拟属性 Schema中如果定义了虚拟属性,那么该属性将不写入数据库,例如: var PersonSchema = new Schema({ ...