如何使用 feathersjs 中的钩子更新 mongodb 数据?

How to update mongodb data using hook in featherjs?

我是 featherjs 的新手,我创建了一个名为 survey.this 的服务是我的数据模型

'use strict';

// surveys-model.js - A mongoose model
// 
// See http://mongoosejs.com/docs/models.html
// for more of what you can do here.

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const surveysSchema = new Schema({
    ownerId: { type: String},
    parentId: { type: String},//Id of campaign or the community
    question: String,
    votes: [{
        voted:[String],
        answer:{type:String,enum:['answer1','answer2']}
    }]


});

const surveysModel = mongoose.model('surveys', surveysSchema);

module.exports = surveysModel;

我需要根据用户投票单独更新投票..我如何使用挂钩在同一服务中进行更新...请帮我提前找到answer.thanks

是否要在挂钩内调用其他服务?如果是这样,那么它们在 hook.app.service.

中可用
hook.app.service('servicename').update(...)