mongoose
https://mongoosejs.com/docs/api/model.html


- findall
  `const tasks = await Task.find()`

- sorting
   `const tasks = await Task.find().sort({complexity: 1})`
- patching
  `const updatedTask = await Task.findByIdAndUpdate(taskID,{complexity},{new: true})`
- inserting using save method
  ```js
   const newTask = new Task({title,complexity})
    const savedTask = await newTask.save()
  ```
- deleting
  `const deletedTask = await Task.findByIdAndDelete(taskID)`

 
basic program

```js
const express = require('express')

const mongoose = require('mongoose')
const cors = require('cors')
require('dotenv').config()

const app = express()
app.use(cors())
app.use(express.json())

const PORT = process.env.PORT || 5000
const MONGO_URI=  process.env.MONGO_URI || 'mongodb://127.0.0.1:27017/merndb'

mongoose.connect(MONGO_URI).then(()=> console.log('mongodb connnected')).catch(err=>console.log('mongodb connection error'))

const TaskSchema = new mongoose.Schema({title: {type: String, require: true}})
const Task = mongoose.model('Task',TaskSchema)

app.get('/api/tasks', async (req,res)=>{
    const tasks = await Task.find();
    res.json(tasks);


})


app.post('/api/tasks', async (req,res)=>{
    const newTask = new Task({title : req.body.title})
    const savedTask = await newTask.save()
    res.status(201).json(savedTask)
} )

app.listen(PORT,()=> console.log(`Server running on port ${PORT}`) )
```