mongoose.model('Person', mongoose.Schema({ name: String}));// `ref` tells Mongoose populate what model to queryconst Movie = mongoose.model('Movie', mongoose.Schema({ title: String, director: { type: mongoose.ObjectId, ref: 'Person' }, actors: [{ type: mongoose.Object...
现有document 同样可以被填充,mongoose 3.6之后支持了 document#populate() 方法。 填充多个现有 document 如果要填充一个或多个 document 或是(像 mapReduce 输出的)对象, 我们可以使用 Model.populate() 方法,此方法适用版本同样需要大于mongoose 3.6。document#populate()和query#populate()也是使用这个方法填充 docume...
Mongoose 在后台执行一个单独的查询来加载引用的文档。 Basic Populate 假设您有两个Mongoose 模型:Movie和Person,电影文件有一个director和一个数组actors。 constPerson=mongoose.model('Person',mongoose.Schema({name:String}));// `ref` tells Mongoose populate what model to queryconstMovie=mongoose.model('Mo...
数据的准备就绪后,接下来就是探索populate方法: Query#populate 什么Query? Query(查询),可以快速和简单的从MongooDB查找出相应的 document(s)。 Mongoose 封装了很多查询的方法,使得对数据库的操作变得简单啦。这里分享一下populate方法用法。 语法: Query.populate(path, [select], [model], [match], [options])...
//other mongoose/app includes above User = require('./config/schema/user-model'), Story = require('./config/schema/story-model'); // data.author_id = 527fc8ff241cdb8c09000003 // data.author_id.username = undefined app.get('/api/query/:id', function (req, res){ ...
Mongoose's TypeScript bindings add a generic parameter Paths to the populate():import { Schema, model, Document, Types } from 'mongoose'; // `Parent` represents the object as it is stored in MongoDB interface Parent { child?: Types.ObjectId, name?: string } const ParentModel = model<...
Thanks in advance node.js mongoose mongoose-populate Here it is. Pins.find(condition) .limit(limit) .sort({time: -1}) .populate({path: 'user_id',select: '_id name pic twitter_id fb_id',options: { lean: true}}) .lean().exec(function(err, pins) { ...
// This time, we're not passing a string, but an object to populate(),多层关联Users.findOne({/* query here */}) .populate({ path: 'address friends', // The string we passed in before populate: { path: 'address' // This will populate the friends' addresses ...
Populate documents or find documents by some query, which is better? (Mongoose/MongoDB)Ask Question Asked 1 year, 7 months ago Modified 1 year, 7 months ago Viewed 18 times Report this ad -1 Suppose their is a user schema and product schema as follow: userSchema: {...
Users.findOne({/* query here */}).populate({ path: 'address friends', // The string we passed in before populate: { path: 'address' // This will populate the friends' addresses } });The first level of items to populate is passed in a key called path. The next level items to ...