db.js

gistfile1.txt

const mongoose = require('mongoose')
mongoose.connect('mongodb://localhost:27017/todoapp', {
    useNewUrlParser: true,
    useUnifiedTopology: true
})
const taskSchema = mongoose.Schema({
    title: String,
    done: Boolean
})
const Task = mongoose.model('Task', taskSchema, 'tasks')


const db = {
    read(data = {}) {
        return new Promise((resolve, reject) => {
            Task.find(data).then(res => {
                resolve(res)
            }).catch((err) => {
                reject(err)
            })
        })
    },
    write(data) {
        return new Promise((resolve, reject) => {
            const t = new Task(data)
            t.save().then(() => {
                resolve()
            }).catch((err) => {
                reject(err)
            })
        })
    },
    update(field,id, newData) {
        return new Promise((resolve, reject) => {
            Task.updateOne({_id: id}, {[field]: newData}).then(res=>{
                resolve(res)
            }).catch((err)=>{
                reject(err)
            })
        })
    },
    delete(id){
        return new Promise((resolve, reject) => {
            Task.deleteOne({_id: id}).then(res=>{
                resolve(res)
            }).catch((err)=>{
                reject(err)
            })
        })
    },
    clear(){
        return new Promise((resolve, reject) => {
            Task.remove({}).then(res=>{
                resolve(res)
            }).catch((err)=>{
                reject(err)
            })
        })
    },
    close(){
        mongoose.connection.close()
    }
}

module.exports = db