Creating Student Server

Creating a Basic Express Server in Node.js

In this section, we'll create a basic Express server in Node.js. This server sets up a foundation for a RESTful API to manage student data.

school/index.js

import express from 'express';
const app = express()
app.use(express.json())
const PORT = 5000;

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

Health Check API

Let's start by implementing a simple health check API endpoint that confirms the server is running smoothly.

school/index.js

import express from 'express';
const app = express()
app.use(express.json())
const PORT = 5000;

app.get('/health', (req, res) => {
    res.json({status: 'All Good!'})
})

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

Output:

Fetching Student Data

Now, we'll add an API endpoint to fetch student data. This endpoint will return a list of students.

school/index.js

import express from 'express';
const app = express()
app.use(express.json())
const PORT = 5000;

const students = [];

app.get('/students', (req, res) => {
    res.json({
        success: true,
        data: students,
        message: "Successfully fetched all students",
    })
})

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

Output:

Adding a New Student

We'll now extend our API to allow the addition of new student records. This involves handling POST requests and validating the data.

school/index.js

const students = [];

app.post('/student', (req, res) => {
    const {name, age, mobile, email} = req.body;

    if (!name) {
    return res.json({
      success: false,
      message: "name is required",
    });
  }

  if (!age) {
    return res.json({
      success: false,
      message: "age is required",
    });
  }

  if (!mobile) {
    return res.json({
      success: false,
      message: "mobile is required",
    });
  }

  if (!email) {
    return res.json({
      success: false,
      message: "email is required",
    });
  }

    const id = Math.floor(Math.random() * 100000) + 1;

    const newStudent = {
        id,
        name,
        age,
        mobile,
        email,
    }

    students.push(newStudent);

    res.json({
        success: true,
        data: newStudent,
        message: "Successfully added a new student"
    });
})

Output:

Fetching Student Data

implemented a route to fetch student data through a GET request

school/index.js

const students = [];

app.get('/students', (req, res) => {
    res.json({
        success: true,
        data: students,
        message: "Successfully fetched all students",
    })
})

Output:

school API now allows the addition of new student records using a POST request and provides a way to retrieve all student data using a GET request.

Fetch student using query parameter

Lastly, we'll implement an API endpoint to retrieve a specific student based on their ID.

school/index.js

const students = [];

app.get("/student", (req, res) => {
  const { id } = req.query;

  let student = null;

  students.forEach((stud) => {
      if (stud.id == id) {
          student = stud;
      }
  });

  if (student == null) {
      return res.json({
          success: false,
          message: "Student not found",
      });
  }

  res.json({
      success: true,
      data: student,
      message: "Successfully fetched student",
  });
})

Output:

Creating a Node.js server using Express to manage student data, including endpoints for health checks, fetching all students, adding a new student, and retrieving a single student.