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Dylan Iqbal

Dylan Iqbal

4 years ago

In this tutorial, you’ll learn Angular 8 MEAN Stack tutorial and how to build an Angular 8 CRUD web application from MEAN scratch with MongoDB, Express js, Node js, and Angular Material UI library.

In this MEAN stack tutorial, you’ll learn to set up a MEAN stack project from scratch. I’ll be creating back-end and front-end for a real-world CRUD web application from scratch.

For the demo purpose, I’ll create a students record management CRUD (create, read, update & delete) web application. In this CRUD app user will be able to perform the following tasks:

  • Add student ID
  • Add student name
  • Add student email
  • Add section Angular Material dropdown
  • Add multiple subjects using Angular material input chips
  • Add student’s gender using Angular material radio buttons
  • Add student date of birth using Angular material datepicker

Angular 8 Project Setup

  • Setting up Node js
  • Setting up Angular 8 CLI
  • Installing & setting up Angular 8 project
  • Creating routes to navigate between components
  • Creating Angular 8 service to manage CRUD operations
  • Consuming RESTful APIsusing Angular 8 Service

Angular Material UI Library

  • Setting up an Angular material ui library in a real-world Angular application.
  • Creating web application’s front-end using Angular material ui components like :- Angular material default theme, icons, buttons, navbar, date-picker, form, data tables and chip inputs.

MEAN Stack Back-end Setup

  • Set up MongoDB in Angular 8 MEAN stack app.
  • Setting up Expressjs server with Node js.
  • Creating RESTful APIs with Node js and Express js.

Table of Contents

  1. Angular 8 MEAN stack tutorial – Workflow of MEAN Stack Angular Material tutorial
  2. Angular 8 MEAN stack tutorial – Installing Node JS and Angular CLI
  3. Angular 8 MEAN stack tutorial – Angular 8 web app project setup
  4. Angular 8 MEAN stack tutorial – Setting up Angular 8 Routes to navigate between components.
  5. Angular 8 MEAN stack tutorial – Setting up Angular Material UI Library in Angular project.
  6. Angular 8 MEAN stack tutorial – Build Mean Stack Backend with MongoDB, Node JS and Express JS.
  7. Angular 8 MEAN stack tutorial – Build Angular 8 Service to Consume REST APIs.
  8. Angular 8 MEAN stack tutorial – Add Student using MEAN Stack REST APIs with Angular Material.
  9. Angular 8 MEAN stack tutorial – Show Students List and Delete Student Object.
  10. Angular 8 MEAN stack tutorial – Edit Students Object.

#1 Workflow of MEAN Stack Angular Material Tutorial

I’ll create application’s frontend in Angular 8 using Angular material 8 UI components and backend with Node js, Expressjs and MongoDB. To make it developer friendly I’ll create a separate project for frontend and backend. I will be building RESTful API using MEAN stack backend and will use those APIs with Angular service to consume the data.

Following technologies, will be used throughout the tutorial.

  • NPM v6.4.1
  • Node v10.15.3
  • RxJS V6.5.2
  • Angular v8.0.0
  • AngularCLI v8.0.0
  • MongoDB 4.0.6
  • MongoDB shell v4.0.6

#2 Installing Node JS and Angular CLI

Firstly, you need to have Node.js and Angular CLI installed in your system to work with Angular 8 Mean stack project. To install Node.js in your system

Node.js will help us to install the required dependencies for this Mean stack project.

In the next step, we’ll be installing Angular CLI with the help of NPM. Now with the help of Angular CLI, we’ll install the new Mean stack project.

npm install @angular/cli -g

We’ve successfully installed Node.js and Angular CLI by now. Now we can use the ng command to generate new Angular project, components, services, routing or many more features of Angular 8.

#3 Angular 8 web app project setup

We are going to build a MEAN stack web app using Angular 8. In our MEAN stack web app, we’ll use the Angular 8 framework to create the frontend of the app. Run the below command to generate a new angular project.

ng new angular8-meanstack-angular-material

Answer some Angular CLI questions:

# ? Would you like to add Angular routing? = Yes

# ? Which stylesheet format would you like to use? = CSS

Head over to the newly created Angular 8 project’s directory using below cmd.

cd angular8-meanstack-angular-material

In next step we’ll create three new components to manage Angular 8 Mean stack Angular CRUD app. Use Angular 8 CLI to generate Angular 8 components:

ng g component components/add-student --module app
ng g component components/edit-student --module app
ng g component components/students-list --module app

We are using --module app parameter because we have 2 module files in the app folder. Now with the –module app parameter We are telling Angular CLI that app.module.ts is our main app module file.

#4 Setting up Angular 8 Routes to navigate between components.

In this part of the tutorial we’ll create routes in our Mean stack angular 8 CRUD app. Routes allow us to navigate between components in Angular app.

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { AddStudentComponent } from './components/add-student/add-student.component';
import { EditStudentComponent } from './components/edit-student/edit-student.component';
import { StudentsListComponent } from './components/students-list/students-list.component';
const routes: Routes = [
{ path: '', pathMatch: 'full', redirectTo: 'add-student' },
{ path: 'add-student', component: AddStudentComponent },
{ path: 'edit-student/:id', component: EditStudentComponent },
{ path: 'students-list', component: StudentsListComponent }
];
@NgModule({
imports: [RouterModule.forRoot(routes)],
exports: [RouterModule]
})
export class AppRoutingModule { }

#5 Setting up Angular Material UI Library in Angular project

We’ll be using Angular Material UI library to build students record management system. I will help you to create a beautiful responsive layout with Angular material ui components. We’ll create Mean stack Angular 8 CRUD app with following Angular material UI components:

  • Angular material default theme
  • Angular material datepicker
  • Angular material icons
  • Angular material buttons
  • Angular material navbar
  • Angular material form
  • Angular material data tables
  • Angular material chip inputs

Run the following command to setup Angular material.

ng add @angular/material

Choose the Angular material theme as per your choice:

? Choose a prebuilt theme name, or "custom" for a custom theme: Indigo/Pink
❯ Indigo/Pink        [ Preview: https://material.angular.io?theme=indigo-pink ] 
Deep Purple/Amber  [ Preview: https://material.angular.io?theme=deeppurple-amber ] 
Pink/Blue Grey     [ Preview: https://material.angular.io?theme=pink-bluegrey ] 
Purple/Green       [ Preview: https://material.angular.io?theme=purple-green ]

Then it will ask for Hammer.js (Gesture recognition support) and Angular browser animation support.

Select yes and hit enter.

Set up HammerJS for gesture recognition? (Y/n) = Y
? Set up browser animations for Angular Material? (Y/n) = Y

We’ve installed Angular material UI library in Angular 8 Mean stack project. Now we’ll create a separate material.module.ts file. In this file we’ll import the various Angular material service so that we can use it and manage centrally in our Angular 8 CRUD web app.

In next step we’ll create a custom Angular material module, Create src > app > material.module.ts file and import the following Angular material UI components in this file like given below.

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import {
MatButtonModule,
MatToolbarModule,
MatIconModule,
MatBadgeModule,
MatSidenavModule,
MatListModule,
MatGridListModule,
MatFormFieldModule,
MatInputModule,
MatSelectModule,
MatRadioModule,
MatDatepickerModule,
MatNativeDateModule,
MatChipsModule,
MatTooltipModule,
MatTableModule,
MatPaginatorModule
} from '@angular/material';
@NgModule({
imports: [
CommonModule,
MatButtonModule,
MatToolbarModule,
MatIconModule,
MatSidenavModule,
MatBadgeModule,
MatListModule,
MatGridListModule,
MatFormFieldModule,
MatInputModule,
MatSelectModule,
MatRadioModule,
MatDatepickerModule,
MatNativeDateModule,
MatChipsModule,
MatTooltipModule,
MatTableModule,
MatPaginatorModule
],
exports: [
MatButtonModule,
MatToolbarModule,
MatIconModule,
MatSidenavModule,
MatBadgeModule,
MatListModule,
MatGridListModule,
MatInputModule,
MatFormFieldModule,
MatSelectModule,
MatRadioModule,
MatDatepickerModule,
MatChipsModule,
MatTooltipModule,
MatTableModule,
MatPaginatorModule
],
providers: [
MatDatepickerModule,
]
})
export class AngularMaterialModule { }

Go to app.module.ts file and import the AngularMaterialModule.

/* Angular material */
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { AngularMaterialModule } from './material.module';
import { NgModule, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
@NgModule({
declarations: [...],
imports: [
BrowserAnimationsModule,
AngularMaterialModule,
],
providers: [...],
bootstrap: [...],
schemas: [CUSTOM_ELEMENTS_SCHEMA]
})
export class AppModule { }

Setup a basic layout with Angular Material

Go to app.component.html file and include the following code.



Student Records


menu




<mat-sidenav #sidenav [mode]="isBiggerScreen() ? 'over' : 'side'" [(opened)]="opened" [fixedInViewport]="true"
[fixedTopGap]>


add Add Student


format_list_bulleted View Students

Add the following code in app.component.ts file.

import { Component, ViewChild, HostListener, OnInit } from '@angular/core';
import { MatSidenav } from '@angular/material/sidenav';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
opened = true;
@ViewChild('sidenav') sidenav: MatSidenav;
ngOnInit() {
console.log(window.innerWidth)
if (window.innerWidth < 768) {
this.sidenav.fixedTopGap = 55;
this.opened = false;
} else {
this.sidenav.fixedTopGap = 55;
this.opened = true;
}
}
@HostListener('window:resize', ['$event'])
onResize(event) {
if (event.target.innerWidth < 768) {
this.sidenav.fixedTopGap = 55;
this.opened = false;
} else {
this.sidenav.fixedTopGap = 55
this.opened = true;
}
}
isBiggerScreen() {
const width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;
if (width < 768) {
return true;
} else {
return false;
}
}
}

To set up the style add the following code in styles.css file.

html,body{height:100%;}
body{margin:0;font-family:'Roboto', sans-serif;}
.header{justify-content:space-between;}
.user-profile{margin-left:15px;}
.mat-sidenav-container{height:100%;display:flex;flex:1 1 auto;}
.mat-nav-list .mat-list-item{font-size:15px;}
.nav-tool-items{display:inline-block;margin-right:13px;}
.user-profile{margin-left:15px;cursor:pointer;}
.hamburger{visibility:hidden !important;}
.mat-sidenav,.mat-sidenav-content{padding:15px;}
.mat-list-item.active{background:rgba(0, 0, 0, .04);}
.mat-sidenav-content{padding:25px 40px 0;}
.mat-sidenav{background-color:#F2F2F2;width:250px;}
.header{position:sticky;position:-webkit-sticky;top:0;z-index:1000;}
mat-sidenav mat-icon{margin-right:12px;}
.hamburger{margin-top:5px;cursor:pointer;}
.mat-radio-button,.mat-radio-group{margin-right:25px;}
.controlers-wrapper>*{width:100%;padding:0;}
.misc-bottom-padding{margin:8px 0 10px;}
.misc-bottom-padding mat-label{margin-right:15px;}
mat-radio-group mat-radio-button{margin-left:5px;}
.button-wrapper button{margin-right:5px;}
table.mat-table,table{width:100%;}
.inner-wrapper{padding:15px 0 130px;width:100%;}
.inner-wrapper mat-card{display:inline-block;margin:0 6% 0 0;vertical-align:top;width:44%;}
.full-wrapper{width:100%;}
.multiple-items{position:relative;}
.multiple-items .tooltip-info{right:0;top:7px;cursor:pointer;color:#a1a7c7;position:absolute;font-size:20px;}
body .push-right{margin-right:10px;}
.no-data{text-align:center;padding-top:30px;color:#6c75a9;}
.button-wrapper{margin:20px 0 0 0;}
@media (max-width:1024px){.inner-wrapper mat-card{width:100%;}
.mat-sidenav-content{padding:20px 20px 0;}
.misc-bottom-padding mat-label{display:block;padding-bottom:10px;}
.mat-sidenav{width:230px;}
.mat-nav-list .mat-list-item{font-size:14px;}
}
@media (max-width:767px){.nav-tool-items{margin-right:0;}
.hamburger{visibility:visible !important;}
}

Your basic layout is ready ready with Angular material library, in next step we’ll set up backend using node js, express js and mongoDB.

#6 Build Mean Stack Backend with MongoDB, NodeJS and ExpressJS

In this part of the tutorial, we are going to build a robust Mean stack backend using mongoDB, nodejs, and expressjs.

Following topics will be covered in this part of the tutorial:

  • Create a separate project for Angular 8 Mean stack backend.
  • Install required dependencies using NPM: body-parser, cors, express js, mongoose, and nodemon.
  • Set up MongoDB Database connection in Mean stack app to access MongoDB database using MongoDB Shell.
  • Define a data model with mongoose JS in Mean stack project.
  • Create RESTful APIs with Express js Routes in Mean Stack Angular 8 Project.
  • Configure Angular 8 Mean Stack backend

Create a separate project for Angular 8 Mean stack backend.

In order to set up a separate Mean stack backend create a folder by the name of backend in the Angular’s root directory.

mkdir backend && cd backend

You’ve created the backend folder and entered into the project.

Next thing is to create a separate package.json for your Mean stack backend.

npm init

Install required dependencies using NPM: body-parser, cors, express js, mongoose, and nodemon.

After that install the required dependencies for your Angular 8 Mean stack app.

npm install --save express mongoose cors body-parser

Then install nodemon package it will save us from restarting the server every-time we make the changes in our backend code.

npm install nodemon --save-dev

Your package.json file for Angular 8 Mean stack backend will look something like this.

{
"name": "angular8-meanstack-backend",
"version": "1.0.0",
"description": "An angular 8 mean stack crud web app with angular material 8.",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "Digamber Rawat",
"license": "ISC",
"dependencies": {
"body-parser": "^1.19.0",
"cors": "^2.8.5",
"express": "^4.17.1",
"mongoose": "^5.5.11"
},
"devDependencies": {
"nodemon": "^1.19.1"
}
}

Set up MongoDB Database connection in Mean stack app to access MongoDB database using MongoDB Shell.

To setup the MongoDB database connection within the Mean stack app, we need to create a folder by the name of database and create a file db.js there. Run the given below command.

mkdir database && cd database && touch db.js

Inside the backend > database > db.js file paste the following code. Here angular8mean is your mongoDB database name.

module.exports = {
db: 'mongodb://localhost:27017/angular8mean'
};

Define Student data model with mongoose JS in Mean stack app.

We’ll create a model folder, inside the model folder we’ll create a Student Schema for students collection in MongoDB. Paste the below code in the model > Student.js file.

const mongoose = require('mongoose');
const Schema = mongoose.Schema;
// Define collection and schema
let Student = new Schema({
student_name: {
type: String
},
student_email: {
type: String
},
section: {
type: String
},
subjects: {
type: Array
},
gender: {
type: String
},
dob: {
type: Date
}
}, {
collection: 'students'
})
module.exports = mongoose.model('Student', Student)

Create RESTful APIs with Express js Routes in Mean Stack Angular 8 Project.

In this Angular 8 Mean stack tutorial we are going to create RESTful APIs using Express js and Node js. I will create a routes folder inside the backend folder and create a student.routes.js file.

Enter the below command to create the routes folder and student.routes.js file.

mkdir routes && cd routes && touch student.route.js

We’ve created RESTful APIs using Express js and Student Model, now Go to student.route.js file and add the following code.

const express = require('express');
const app = express();
const studentRoute = express.Router();
// Student model
let Student = require('../model/Student');
// Add Student
studentRoute.route('/add-student').post((req, res, next) => {
Student.create(req.body, (error, data) => {
if (error) {
return next(error)
} else {
res.json(data)
}
})
});
// Get all student
studentRoute.route('/').get((req, res) => {
Student.find((error, data) => {
if (error) {
return next(error)
} else {
res.json(data)
}
})
})
// Get single student
studentRoute.route('/read-student/:id').get((req, res) => {
Student.findById(req.params.id, (error, data) => {
if (error) {
return next(error)
} else {
res.json(data)
}
})
})
// Update student
studentRoute.route('/update-student/:id').put((req, res, next) => {
Student.findByIdAndUpdate(req.params.id, {
$set: req.body
}, (error, data) => {
if (error) {
return next(error);
console.log(error)
} else {
res.json(data)
console.log('Student successfully updated!')
}
})
})
// Delete student
studentRoute.route('/delete-student/:id').delete((req, res, next) => {
Student.findByIdAndRemove(req.params.id, (error, data) => {
if (error) {
return next(error);
} else {
res.status(200).json({
msg: data
})
}
})
})
module.exports = studentRoute;

Configure Angular 8 Mean Stack backend

Now we’ll create app.js file in backend folder’s root. Run the below command to generate backend > app.js file.

touch app.js

Mange Backend settings in Mean stack Project.

Now we are going to create app.js file this file will hold the core logic of our Mean stack project’s backend logic. This file will manage the following things.

  • Setup port using express.
  • Setup 404 error using express js.
  • Making mongoDB database connection
  • Serving static files using express js in Mean stack app.
  • Handling errors using Express js in Angular 8 Mean stack project.
let express = require('express'),
path = require('path'),
mongoose = require('mongoose'),
cors = require('cors'),
bodyParser = require('body-parser'),
dataBaseConfig = require('./database/db');
// Connecting mongoDB
mongoose.Promise = global.Promise;
mongoose.connect(dataBaseConfig.db, {
useNewUrlParser: true
}).then(() => {
console.log('Database connected sucessfully ')
},
error => {
console.log('Could not connected to database : ' + error)
}
)
// Set up express js port
const studentRoute = require('../backend/routes/student.route')
const app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
extended: false
}));
app.use(cors());
app.use(express.static(path.join(__dirname, 'dist/angular8-meanstack-angular-material')));
app.use('/', express.static(path.join(__dirname, 'dist/angular8-meanstack-angular-material')));
app.use('/api', studentRoute)
// Create port
const port = process.env.PORT || 4000;
const server = app.listen(port, () => {
console.log('Connected to port ' + port)
})
// Find 404 and hand over to error handler
app.use((req, res, next) => {
next(createError(404));
});
// error handler
app.use(function (err, req, res, next) {
console.error(err.message);
if (!err.statusCode) err.statusCode = 500;
res.status(err.statusCode).send(err.message);
});

Everything has been placed at its place, now we have to start the Angular 8 project, mongoDB server and Nodemon server.

Run the following commands…

Start the Angular project:

ng serve

Initialise the mongoDB database:

cd backend && mongod

Start the nodemon server:

cd backend && nodemon

I hope your Angular 8 Mean stack backend server is running fine, you can check your frontend and backend on the following URLs:

Angular frontend URL:

http://localhost:4200

MEAN stack backend URL:

http://localhost:4000/api

MEAN stack RESTful APIs using Express JS

We can hit the below command in the terminal to check out how our newly created RESTful APIs are working.

curl -i -H "Accept: application/json" localhost:4000/api
# HTTP/1.1 200 OK
# X-Powered-By: Express
# Access-Control-Allow-Origin: *
# Content-Type: application/json; charset=utf-8
# Content-Length: 58
# ETag: W/"3a-dzxOuKmgt3HAevjaPlycYSK+FhI"
# Date: Sun, 26 May 2019 18:53:03 GMT
# Connection: keep-alive

If we are getting this type of response that means we are ready to go with our APIs. Or similarly we can also use Postmen API development environment tool to test our RESTful APIs.

#7 Build Angular 8 Service to Consume REST APIs

To create Angular 8 Mean stack student records management system app. We need to create a service file where we’ll consume REST APIs to manage the student data. This service file will manage the Create, Read, Update and Delete operations.

Configure Angular 8 HttpClientModule:

Import HttpClientModule service in app.module.ts file.

/* Angular 8 http service */
import { HttpClientModule } from '@angular/common/http';
@NgModule({
imports: [
HttpClientModule
]
})

Create & configure Student class:

Enter the below command to create model > student.ts file.

export class Student {
_id: String;
student_name: String;
student_email: String;
section: String;
subjects: Array;
dob: Date;
gender: String;
}

Create Angular 8 service to Consume REST APIs

Enter the following command to create Angular 8 service to manage CRUD operations in Angular 8 MEAN Stack web app.

ng g s shared/api

In the given below code we’ve consumed REST APIs using Angular 8 service. Add the following code in your shared > api.service.ts file.

import { Injectable } from '@angular/core';
import { Student } from './student';
import { Observable, throwError } from 'rxjs';
import { catchError, map } from 'rxjs/operators';
import { HttpClient, HttpHeaders, HttpErrorResponse } from '@angular/common/http';
@Injectable({
providedIn: 'root'
})
export class ApiService {
endpoint: string = 'http://localhost:4000/api';
headers = new HttpHeaders().set('Content-Type', 'application/json');
constructor(private http: HttpClient) { }
// Add student
AddStudent(data: Student): Observable {
let API_URL = `${this.endpoint}/add-student`;
return this.http.post(API_URL, data)
.pipe(
catchError(this.errorMgmt)
)
}
// Get all students
GetStudents() {
return this.http.get(`${this.endpoint}`);
}
// Get student
GetStudent(id): Observable {
let API_URL = `${this.endpoint}/read-student/${id}`;
return this.http.get(API_URL, { headers: this.headers }).pipe(
map((res: Response) => {
return res || {}
}),
catchError(this.errorMgmt)
)
}
// Update student
UpdateStudent(id, data: Student): Observable {
let API_URL = `${this.endpoint}/update/${id}`;
return this.http.put(API_URL, data, { headers: this.headers }).pipe(
catchError(this.errorMgmt)
)
}
// Delete student
DeleteStudent(id): Observable {
var API_URL = `${this.endpoint}/delete-student/${id}`;
return this.http.delete(API_URL).pipe(
catchError(this.errorMgmt)
)
}
// Error handling 
errorMgmt(error: HttpErrorResponse) {
let errorMessage = '';
if (error.error instanceof ErrorEvent) {
// Get client-side error
errorMessage = error.error.message;
} else {
// Get server-side error
errorMessage = `Error Code: ${error.status}\nMessage: ${error.message}`;
}
console.log(errorMessage);
return throwError(errorMessage);
}
}

Go to app.module.ts file and import this API service like given below.

/* Angular 8 CRUD services */
import { ApiService } from './shared/api.service';
@NgModule({
providers: [ApiService]
})

#8 Add Student using MEAN Stack REST APIs with Angular Material

In this part of the tutorial we will learn to add student in the MongoDB database. We’ll be using Angular 8 Reactive form to add student in the database.

Import ReactiveFormsModule API in App Module File

In order to work with Angular 8 Reactive Forms we must import the ReactiveFormsModule API and FormsModule API in app.module.ts file.

/* Reactive form services in Angular 8 */
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
@NgModule({
imports: [
ReactiveFormsModule,
FormsModule
],
})
export class AppModule { }

Go to add-student.component.ts file and include the given below code.

import { Router } from '@angular/router';
import { Component, OnInit, ViewChild, NgZone } from '@angular/core';
import { COMMA, ENTER } from '@angular/cdk/keycodes';
import { MatChipInputEvent } from '@angular/material';
import { ApiService } from './../../shared/api.service';
import { FormGroup, FormBuilder, Validators } from "@angular/forms";
export interface Subject {
name: string;
}
@Component({
selector: 'app-add-student',
templateUrl: './add-student.component.html',
styleUrls: ['./add-student.component.css']
})
export class AddStudentComponent implements OnInit {
visible = true;
selectable = true;
removable = true;
addOnBlur = true;
@ViewChild('chipList') chipList;
@ViewChild('resetStudentForm') myNgForm;
readonly separatorKeysCodes: number[] = [ENTER, COMMA];
studentForm: FormGroup;
subjectArray: Subject[] = [];
SectioinArray: any = ['A', 'B', 'C', 'D', 'E'];
ngOnInit() {
this.submitBookForm();
}
constructor(
public fb: FormBuilder,
private router: Router,
private ngZone: NgZone,
private studentApi: ApiService
) { }
/* Reactive book form */
submitBookForm() {
this.studentForm = this.fb.group({
student_name: ['', [Validators.required]],
student_email: ['', [Validators.required]],
section: ['', [Validators.required]],
subjects: [this.subjectArray],
dob: ['', [Validators.required]],
gender: ['Male']
})
}
/* Add dynamic languages */
add(event: MatChipInputEvent): void {
const input = event.input;
const value = event.value;
// Add language
if ((value || '').trim() && this.subjectArray.length < 5) {
this.subjectArray.push({ name: value.trim() })
}
// Reset the input value
if (input) {
input.value = '';
}
}
/* Remove dynamic languages */
remove(subject: Subject): void {
const index = this.subjectArray.indexOf(subject);
if (index >= 0) {
this.subjectArray.splice(index, 1);
}
}  
/* Date */
formatDate(e) {
var convertDate = new Date(e.target.value).toISOString().substring(0, 10);
this.studentForm.get('dob').setValue(convertDate, {
onlyself: true
})
}  
/* Get errors */
public handleError = (controlName: string, errorName: string) => {
return this.studentForm.controls[controlName].hasError(errorName);
}  
/* Submit book */
submitStudentForm() {
if (this.studentForm.valid) {
this.studentApi.AddStudent(this.studentForm.value).subscribe(res => {
this.ngZone.run(() => this.router.navigateByUrl('/students-list'))
});
}
}
}

Then go to add-student.component.html file and add the following code.



# Add Student













You must provide a**student name**






You must provide a**student email**




Section

{{sectioinArray}}



Section is required










<mat-chip *ngFor="let subjectArray of subjectArray" [selectable]="selectable" [removable]="removable"
(removed)="remove(subjectArray)">
{{subjectArray.name}}
cancel

<input placeholder="Add subject" [matChipInputFor]="chipList"
[matChipInputSeparatorKeyCodes]="separatorKeysCodes" [matChipInputAddOnBlur]="addOnBlur"
(matChipInputTokenEnd)="add($event)">


info




<input matInput readonly [matDatepicker]="picker" placeholder="Date of birth" formControlName="dob"
(dateChange)="formatDate($event)">



Date of birth is required




Gender:

Male
Female








Submit

#9 Show Students List and Delete Student Object

Go to students-list.component.ts file and add the given below code. In this file, we’ll manage the following tasks.

  • Implement the Angular material data tables and Pagination with Angular 8 Mean stack project.
  • Render Students List using Mean stack REST APIs
  • Delete Single Object using REST APIs in Angular 8 Mean stack app
import { Student } from './../../shared/student';
import { ApiService } from './../../shared/api.service';
import { Component, ViewChild, OnInit } from '@angular/core';
import { MatPaginator, MatTableDataSource } from '@angular/material';
@Component({
selector: 'app-students-list',
templateUrl: './students-list.component.html',
styleUrls: ['./students-list.component.css']
})
export class StudentsListComponent implements OnInit {
StudentData: any = [];
dataSource: MatTableDataSource;
@ViewChild(MatPaginator) paginator: MatPaginator;
displayedColumns: string[] = ['_id', 'student_name', 'student_email', 'section', 'action'];
constructor(private studentApi: ApiService) {
this.studentApi.GetStudents().subscribe(data => {
this.StudentData = data;
this.dataSource = new MatTableDataSource(this.StudentData);
setTimeout(() => {
this.dataSource.paginator = this.paginator;
}, 0);
})    
}
ngOnInit() { }
deleteStudent(index: number, e){
if(window.confirm('Are you sure')) {
const data = this.dataSource.data;
data.splice((this.paginator.pageIndex * this.paginator.pageSize) + index, 1);
this.dataSource.data = data;
this.studentApi.DeleteStudent(e._id).subscribe()
}
}
}

Now, go to students-list.component.html file and include the following code.



# Students List




There is no student added yet!

 0">



 Student ID 
 {{element._id}} 


 Student Name 
 {{element.student_name}} 


 Email 
 {{element.student_email}} 


 Section 
 {{element.section}} 


 Action 

<button mat-raised-button color="primary" class="push-right"
[routerLink]="['/edit-student/', element._id]">Edit
Delete

#10 Edit Students Object in Mean Stack App

We are going to create edit functionality using RESTful API in Mean stack app with Angular Material 8.

Go to edit-list.component.ts file and add the following code.

import { Router, ActivatedRoute } from '@angular/router';
import { Component, OnInit, ViewChild, NgZone } from '@angular/core';
import { COMMA, ENTER } from '@angular/cdk/keycodes';
import { MatChipInputEvent } from '@angular/material';
import { ApiService } from './../../shared/api.service';
import { FormGroup, FormBuilder, Validators } from "@angular/forms";
export interface Subject {
name: string;
}
@Component({
selector: 'app-edit-student',
templateUrl: './edit-student.component.html',
styleUrls: ['./edit-student.component.css']
})
export class EditStudentComponent implements OnInit {
visible = true;
selectable = true;
removable = true;
addOnBlur = true;
@ViewChild('chipList') chipList;
@ViewChild('resetStudentForm') myNgForm;
readonly separatorKeysCodes: number[] = [ENTER, COMMA];
studentForm: FormGroup;
subjectArray: Subject[] = [];
SectioinArray: any = ['A', 'B', 'C', 'D', 'E'];
ngOnInit() {
this.updateBookForm();
}
constructor(
public fb: FormBuilder,
private router: Router,
private ngZone: NgZone,
private actRoute: ActivatedRoute,
private studentApi: ApiService
) { 
var id = this.actRoute.snapshot.paramMap.get('id');
this.studentApi.GetStudent(id).subscribe(data => {
console.log(data.subjects)
this.subjectArray = data.subjects;
this.studentForm = this.fb.group({
student_name: [data.student_name, [Validators.required]],
student_email: [data.student_email, [Validators.required]],
section: [data.section, [Validators.required]],
subjects: [data.subjects],
dob: [data.dob, [Validators.required]],
gender: [data.gender]
})      
})    
}
/* Reactive book form */
updateBookForm() {
this.studentForm = this.fb.group({
student_name: ['', [Validators.required]],
student_email: ['', [Validators.required]],
section: ['', [Validators.required]],
subjects: [this.subjectArray],
dob: ['', [Validators.required]],
gender: ['Male']
})
}
/* Add dynamic languages */
add(event: MatChipInputEvent): void {
const input = event.input;
const value = event.value;
// Add language
if ((value || '').trim() && this.subjectArray.length < 5) {
this.subjectArray.push({ name: value.trim() })
}
// Reset the input value
if (input) {
input.value = '';
}
}
/* Remove dynamic languages */
remove(subject: Subject): void {
const index = this.subjectArray.indexOf(subject);
if (index >= 0) {
this.subjectArray.splice(index, 1);
}
}
/* Date */
formatDate(e) {
var convertDate = new Date(e.target.value).toISOString().substring(0, 10);
this.studentForm.get('dob').setValue(convertDate, {
onlyself: true
})
}
/* Get errors */
public handleError = (controlName: string, errorName: string) => {
return this.studentForm.controls[controlName].hasError(errorName);
}
/* Update book */
updateStudentForm() {
console.log(this.studentForm.value)
var id = this.actRoute.snapshot.paramMap.get('id');
if (window.confirm('Are you sure you want to update?')) {
this.studentApi.UpdateStudent(id, this.studentForm.value).subscribe( res => {
this.ngZone.run(() => this.router.navigateByUrl('/students-list'))
});
}
}
}

Now go to edit-list.component.html file and add the following code.



# Add Student













You must provide a**student name**






You must provide a**student email**




Section

{{sectioinArray}}



Section is required










<mat-chip *ngFor="let subjectArray of subjectArray" [selectable]="selectable" [removable]="removable"
(removed)="remove(subjectArray)">
{{subjectArray.name}}
cancel

<input placeholder="Add subject" [matChipInputFor]="chipList"
[matChipInputSeparatorKeyCodes]="separatorKeysCodes" [matChipInputAddOnBlur]="addOnBlur"
(matChipInputTokenEnd)="add($event)">


info




<input matInput readonly [matDatepicker]="picker" placeholder="Date of birth" formControlName="dob"
(dateChange)="formatDate($event)">



Date of birth is required




Gender:

Male
Female








Update

Conclusion

Finally, we have created a basic Angular 8 MEAN stack CRUD web app with Angular Material. Anyhow, if we have missed anything you can check out GitHub repo of this project.

#angular #web-development #node-js #express #mongodb

MEAN Stack Angular 8 CRUD Web Application

positronx.io

MEAN Stack Angular 8 CRUD Web Application

In this tutorial, you’ll learn Angular 8 MEAN Stack tutorial and how to build an Angular 8 CRUD web application from MEAN scratch with MongoDB, Express js, Node js, and Angular Material UI library.

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