CRUD-Nodejs-MongoDB

CRPD operation through API in Nodejs connected to MongoDB Atlas
C - Create
R - Read
P - Patch
D - Delete

Overview Of the API we are coding

Methods	Urls	Actions
POST	/adduser	Create new User
GET	/users	Get all Users Data
PATCH	/user/:id	Update a User by id
DELETE	/user/:id	Delete a User by :id

How to run the Project ?

• Git Clone the Project
• In the main directory run this command

nodemon server.js

Packages to download

npm i mongoose
npm i nodemon

Connection to MongoDB Atlas

• Create a file named server.js
• Paste this code given below

const mongoose = require("mongoose")

mongoose.connect(
  "mongodb+srv://<username>:<password>@cluster0.04hy5.mongodb.net/<database>?retryWrites=true&w=majority",
  {
    useNewUrlParser: true,
    useUnifiedTopology: true
  }
)

Model for the document

• Create a file named user.js
• Paste this code given below

const mongoose = require("mongoose")

const UserSchema = new mongoose.Schema({
  name: {
    type: String,
    require: true
  },
  email: {
    type: String,
    unique: true,
    require: true
  },
  password: {
    type: String,
    require: true
  }
})

const User = mongoose.model("User", UserSchema)

module.exports = User

API's

POST Request

app.post("/adduser", async (request, response) => {
  const user = new User(request.body)
  try {
     await user.save()
  } catch (error) {
    response.status(500).send(error)
  }
 })

GET Request

app.get("/users", async (request, response) => {
  const users = await User.find({})
  try {
    response.send(users)
  } catch (error) {
    response.status(500).send(error)
  }
})

PATCH Request

app.patch("/user/:id", async (request, response) => {
  const updates = Object.keys(request.body)
  try {
    const id = request.params.id
    const updatedData = request.body
    const options = { new: true }
    const result = await User.findByIdAndUpdate(
      id, updatedData, options
    )
    response.send(result)
  } catch (error) {
    response.status(500).send(error)
  }
})

DELETE Request

app.delete("/user/:id", async (request, response) => {
  try {
    const user = await User.findByIdAndDelete(request.params.id)
    if (!user) response.status(404).send("No user found")
    response.status(200).send()
  } catch (error) {
    response.status(500).send(error)
  }
})

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