问题描述
我正在为约会应用构建Mongoose模式.
I'm building a Mongoose schema for a dating app.
我希望每个person
文档都包含对其经历过的所有事件的引用,其中events
是系统中具有其自身模型的另一个架构.如何在架构中对此进行描述?
I want each person
document to contain a reference to all the events they've been to, where events
is another schema with its own models in the system. How can I describe this in the schema?
var personSchema = mongoose.Schema({
firstname: String,
lastname: String,
email: String,
gender: {type: String, enum: ["Male", "Female"]}
dob: Date,
city: String,
interests: [interestsSchema],
eventsAttended: ???
});
推荐答案
您可以使用 人口
You can describe it by using Population
假设您的事件架构定义如下:
Suppose your Event Schema is defined as follows:
var mongoose = require('mongoose')
, Schema = mongoose.Schema
var eventSchema = Schema({
title : String,
location : String,
startDate : Date,
endDate : Date
});
var personSchema = Schema({
firstname: String,
lastname: String,
email: String,
gender: {type: String, enum: ["Male", "Female"]}
dob: Date,
city: String,
interests: [interestsSchema],
eventsAttended: [{ type: Schema.Types.ObjectId, ref: 'Event' }]
});
var Event = mongoose.model('Event', eventSchema);
var Person = mongoose.model('Person', personSchema);
要显示如何使用填充,请首先创建一个人员对象aaron = new Person({firstname: 'Aaron'})
和一个事件对象event1 = new Event({title: 'Hackathon', location: 'foo'})
:
To show how populate is used, first create a person object, aaron = new Person({firstname: 'Aaron'})
and an event object, event1 = new Event({title: 'Hackathon', location: 'foo'})
:
aaron.eventsAttended.push(event1);
aaron.save(callback);
然后,当您进行查询时,您可以像这样填充引用:
Then, when you make your query, you can populate references like this:
Person
.findOne({ firstname: 'Aaron' })
.populate('eventsAttended') // only works if we pushed refs to person.eventsAttended
.exec(function(err, person) {
if (err) return handleError(err);
console.log(person);
});
这篇关于如何在我的Mongoose模式中引用另一个模式?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!