Angular 10 + Spring Boot + MongoDB example: full-stack CRUD Application

In this tutorial, I will show you way to build a full stack Angular 10 + Spring Boot + MongoDB example with a CRUD Application. The back-end server uses Spring Boot with Spring Web MVC for REST Controller and Spring Data MongoDB for interacting with MongoDB database. Front-end side is made with Angular 10, HTTPClient & Router.

Newer version: Angular 11 + Spring Boot + MongoDB example: CRUD Application

More Practice:
Spring Boot, MongoDB: JWT Authentication & Authorization example
Pagination with Angular 10 + Spring Boot example

Serverless with Firebase:
Angular 10 Firebase CRUD Realtime Database
Angular 10 Firestore CRUD with AngularFireStore


Angular 10 & Spring Boot MongoDB CRUD example

We will build a full-stack Tutorial Application in that:

  • Each Tutorial has id, title, description, published status.
  • We can create, retrieve, update, delete Tutorials.
  • We can also find Tutorials by title.

The images below shows screenshots of our System.

– Add Tutorial:

angular-10-spring-boot-mongodb-crud-example-create

– Retrieve all Tutorials:

angular-10-spring-boot-mongodb-crud-example-retrieve

– Click on Edit button to update a Tutorial:

angular-10-spring-boot-mongodb-crud-example-update

On this Page, you can:

  • change status to Published using Publish button
  • delete the Tutorial using Delete button
  • update the Tutorial details with Update button

angular-10-spring-boot-mongodb-crud-example-update-successful

– Search Tutorials by title:

angular-10-spring-boot-mongodb-crud-example-search

– Check MongoDB Database:

angular-10-spring-boot-mongodb-crud-example-database

Angular 10 + Spring Boot + MongoDB Architecture

This is the application architecture we will build:

angular-10-spring-boot-mongodb-crud-example-architecture

– Spring Boot exports REST Apis using Spring Web MVC & interacts with MongoDB Database using Spring Data MongoDB
– Angular Client sends HTTP Requests and retrieve HTTP Responses using axios, shows data on the components. We also use Angular Router for navigating to pages.

Spring Boot Back-end

Overview

These are APIs that Spring Boot App will export:

MethodsUrlsActions
POST/api/tutorialscreate new Tutorial
GET/api/tutorialsretrieve all Tutorials
GET/api/tutorials/:idretrieve a Tutorial by :id
PUT/api/tutorials/:idupdate a Tutorial by :id
DELETE/api/tutorials/:iddelete a Tutorial by :id
DELETE/api/tutorialsdelete all Tutorials
GET/api/tutorials?title=[keyword]find all Tutorials which title contains keyword

We make CRUD operations & finder methods with Spring Data MongoDB’s MongoRepository.

Technology

  • Java 8
  • Spring Boot 2.2.4 (with Spring Web MVC, Spring Data MongoDB)
  • MongoDB
  • Maven 3.6.1

Project Structure

angular-10-spring-boot-mongodb-example-server-project-structure

  • Tutorial data model class corresponds to entity and table tutorials.
  • TutorialRepository is an interface that extends MongoRepository for CRUD methods and custom finder methods. It will be autowired in TutorialController.
  • TutorialController is a RestController which has request mapping methods for RESTful requests such as: getAllTutorials, createTutorial, updateTutorial, deleteTutorial, findByPublished
  • Configuration for Spring Data MongoDB is in application.properties.
  • pom.xml contains dependencies for Spring Boot Web MVC and Spring Data MongoDB.

Implementation

Create & Setup Spring Boot project

Use Spring web tool or your development tool (Spring Tool Suite, Eclipse, Intellij) to create a Spring Boot project.

Then open pom.xml and add these dependencies:

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>

Configure Spring Data MongoDB

Under src/main/resources folder, open application.properties and add following lines.

spring.data.mongodb.database=bezkoder_db
spring.data.mongodb.port=27017

Define Data Model

Our Data model is Tutorial with four fields: id, title, description, published.
In model package, we define Tutorial class.

model/Tutorial.java

package com.bezkoder.spring.data.mongodb.model;

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

@Document(collection = "tutorials")
public class Tutorial {
  @Id
  private String id;

  private String title;
  private String description;
  private boolean published;

  ...
}

@Document annotation helps us override the collection name by “tutorials”.

Create Repository Interface

Let’s create a repository to interact with Tutorials from the database.
In repository package, create TutorialRepository interface that extends MongoRepository.

repository/TutorialRepository.java

package com.bezkoder.spring.data.mongodb.repository;

import java.util.List;

import org.springframework.data.mongodb.repository.MongoRepository;

import com.bezkoder.spring.data.mongodb.model.Tutorial;

public interface TutorialRepository extends MongoRepository<Tutorial, String> {
  List<Tutorial> findByTitleContaining(String title);
  List<Tutorial> findByPublished(boolean published);
}

Now we can use MongoRepository’s methods: save(), findOne(), findById(), findAll(), count(), delete(), deleteById()… without implementing these methods.

We also define custom finder methods:
findByTitleContaining(): returns all Tutorials which title contains input title.
findByPublished(): returns all Tutorials with published having value as input published.

The implementation is plugged in by Spring Data MongoDB automatically.

Create Spring Rest APIs Controller

Finally, we create a controller that provides APIs for creating, retrieving, updating, deleting and finding Tutorials.

controller/TutorialController.java

package com.bezkoder.spring.data.mongodb.controller;
...

@CrossOrigin(origins = "http://localhost:8081")
@RestController
@RequestMapping("/api")
public class TutorialController {

  @Autowired
  TutorialRepository tutorialRepository;

  @GetMapping("/tutorials")
  public ResponseEntity<List<Tutorial>> getAllTutorials(@RequestParam(required = false) String title) {
    
  }

  @GetMapping("/tutorials/{id}")
  public ResponseEntity<Tutorial> getTutorialById(@PathVariable("id") String id) {
    
  }

  @PostMapping("/tutorials")
  public ResponseEntity<Tutorial> createTutorial(@RequestBody Tutorial tutorial) {
    
  }

  @PutMapping("/tutorials/{id}")
  public ResponseEntity<Tutorial> updateTutorial(@PathVariable("id") String id, @RequestBody Tutorial tutorial) {
    
  }

  @DeleteMapping("/tutorials/{id}")
  public ResponseEntity<HttpStatus> deleteTutorial(@PathVariable("id") String id) {
    
  }

  @DeleteMapping("/tutorials")
  public ResponseEntity<HttpStatus> deleteAllTutorials() {
    
  }

  @GetMapping("/tutorials/published")
  public ResponseEntity<List<Tutorial>> findByPublished() {
    
  }

}

@CrossOrigin is for configuring allowed origins.
@RestController annotation is used to define a controller and to indicate that the return value of the methods should be be bound to the web response body.
@RequestMapping("/api") declares that all Apis’ url in the controller will start with /api.
– We use @Autowired to inject TutorialRepository bean to local variable.

You can continue with step by step to implement this Spring Boot Server in the post:
Spring Boot with MongoDB CRUD example using Spring Data

Run Spring Boot Server

Run Spring Boot application with Maven command: mvn spring-boot:run.

Angular 10 Front-end

Overview

angular-10-spring-boot-mongodb-example-front-end-overview

– The App component is a container with router-outlet. It has navbar that links to routes paths via routerLink.

TutorialsList component gets and displays Tutorials.
Tutorial component has form for editing Tutorial’s details based on :id.
AddTutorial component has form for submission new Tutorial.

– These Components call TutorialService methods which use Angular HTTPClient to make HTTP requests and receive responses.

Technology

  • Angular 10
  • Angular HTTPClient
  • Angular Router

Project Structure

angular-10-spring-boot-mongodb-example-angular-project-structure

– There are 3 components: tutorials-list, tutorial-details, add-tutorial.
tutorial.service has methods for sending HTTP requests to the Apis.
app-routing.module.ts defines routes for each component.
app component contains router view and navigation bar.
app.module.ts declares Angular components and import necessary modules.

Implementation

Setup Angular 10 Project

Let’s open cmd and use Angular CLI to create a new Angular Project as following command:

ng new Angular10Crud
? Would you like to add Angular routing? Yes
? Which stylesheet format would you like to use? CSS

We also need to generate some Components and Services:

ng g s services/tutorial

ng g c components/add-tutorial
ng g c components/tutorial-details
ng g c components/tutorials-list

Set up App Module

Open app.module.ts and import FormsModule, HttpClientModule:

...
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';

@NgModule({
  declarations: [ ... ],
  imports: [
    ...
    FormsModule,
    HttpClientModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

Define Routes for Angular AppRoutingModule

There are 3 main routes:
/tutorials for tutorials-list component
/tutorials/:id for tutorial-details component
/add for add-tutorial component

app-routing.module.ts

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { TutorialsListComponent } from './components/tutorials-list/tutorials-list.component';
import { TutorialDetailsComponent } from './components/tutorial-details/tutorial-details.component';
import { AddTutorialComponent } from './components/add-tutorial/add-tutorial.component';

const routes: Routes = [
  { path: '', redirectTo: 'tutorials', pathMatch: 'full' },
  { path: 'tutorials', component: TutorialsListComponent },
  { path: 'tutorials/:id', component: TutorialDetailsComponent },
  { path: 'add', component: AddTutorialComponent }
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

Create Data Service

This service will use Angular HTTPClient to send HTTP requests.
You can see that its functions includes CRUD operations and finder method.

services/tutorial.service.ts

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

const baseUrl = 'http://localhost:8080/api/tutorials';

@Injectable({
  providedIn: 'root'
})
export class TutorialService {

  constructor(private http: HttpClient) { }

  getAll(): Observable<any> {
    return this.http.get(baseUrl);
  }

  get(id): Observable<any> {
    return this.http.get(`${baseUrl}/${id}`);
  }

  create(data): Observable<any> {
    return this.http.post(baseUrl, data);
  }

  update(id, data): Observable<any> {
    return this.http.put(`${baseUrl}/${id}`, data);
  }

  delete(id): Observable<any> {
    return this.http.delete(`${baseUrl}/${id}`);
  }

  deleteAll(): Observable<any> {
    return this.http.delete(baseUrl);
  }

  findByTitle(title): Observable<any> {
    return this.http.get(`${baseUrl}?title=${title}`);
  }
}

Create Angular Components

As you’ve known before, there are 3 components corresponding to 3 routes defined in AppRoutingModule.

  • Add new Item Component
  • List of items Component
  • Item details Component

You can continue with step by step to implement this Angular App in the post:
Angular 10 CRUD Application example with Web API

Other versions:
Angular 8 CRUD Application example with Web API
Angular 11 CRUD Application example with Web API

Run the Angular 10 App

You can run this App with command: ng serve --port 8081.
If the process is successful, open Browser with Url: http://localhost:8081/ and check it.

Further Reading

Newer version: Angular 11 + Spring Boot + MongoDB example: CRUD Application

Conclusion

Now we have an overview of Angular 10 + Spring Boot + MongoDB example when building a CRUD App.

We also take a look at client-server architecture for REST API using Spring Web MVC & Spring Data MongoDB, as well as Angular 10 project structure for building a front-end app to make HTTP requests and consume responses.

Next tutorials show you more details about how to implement the system:
Back-end

– Front-end:

You will want to know how to run both projects in one place:
How to Integrate Angular with Spring Boot Rest API

Or Server side Pagination:
Pagination with Angular 10 + Spring Boot example

Serverless with Firebase:
Angular 10 Firebase CRUD Realtime Database
Angular 10 Firestore CRUD with AngularFireStore

Happy learning, see you again!

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