Dora Bradley

1638620604

Pega Certified Business Architect (PCBA)

Start your Preparation for Pega PCBA and become Pega Certified Business Architect certified with ProcessExam.com. Here you get online practice tests prepared and approved by Pega certified experts based on their own certification exam experience. Here, you also get the detailed and regularly updated syllabus for Pega PCBA.
Pega PCBA practice tests provided by the ProcessExam.com is just one of the promising techniques of preparation for the PCBA exam. This Pega Certified Business Architect practice tests are composed by a team of experienced professionals. Upgraded PEGAPCBA85V1 practice questions will give you the useful experience of learning for the Pega PCBA exam. You can gain the Pega Certified Business Architect certification on the first go with the help of the PCBA practice questions.
If you are planning to prepare for PCBA exam, but not sure how hard the exam is and you want to try out a sample test, you can take our PCBA practice test. To help you assess your readiness, we’ve developed a set of Pega PCBA sample questions and assembled them into a free online test exam.
Getting that Pega PCBA certification is a great first step and these practice tests can help you toward a better score. Millions of aspirants have become certified with our practice tests. Give your preparation a new edge with ProcessExam.com practice tests.
Effective and dynamic self-preparation is very important for your success in your Pega Business Architect certification exam. You therefore need to explore all options of preparation that are available to you. After studying all the resource materials, you still need to go through different practice tests to evaluate your knowledge base and skill set.

https://pegacertexam.wordpress.com/2020/12/16/study-tips-passing-pega-certified-business-architect-pcba-exam/

What is GEEK

Buddha Community

Carmen  Grimes

Carmen Grimes

1595491178

Best Electric Bikes and Scooters for Rental Business or Campus Facility

The electric scooter revolution has caught on super-fast taking many cities across the globe by storm. eScooters, a renovated version of old-school scooters now turned into electric vehicles are an environmentally friendly solution to current on-demand commute problems. They work on engines, like cars, enabling short traveling distances without hassle. The result is that these groundbreaking electric machines can now provide faster transport for less — cheaper than Uber and faster than Metro.

Since they are durable, fast, easy to operate and maintain, and are more convenient to park compared to four-wheelers, the eScooters trend has and continues to spike interest as a promising growth area. Several companies and universities are increasingly setting up shop to provide eScooter services realizing a would-be profitable business model and a ready customer base that is university students or residents in need of faster and cheap travel going about their business in school, town, and other surrounding areas.

Electric Scooters Trends and Statistics

In many countries including the U.S., Canada, Mexico, U.K., Germany, France, China, Japan, India, Brazil and Mexico and more, a growing number of eScooter users both locals and tourists can now be seen effortlessly passing lines of drivers stuck in the endless and unmoving traffic.

A recent report by McKinsey revealed that the E-Scooter industry will be worth― $200 billion to $300 billion in the United States, $100 billion to $150 billion in Europe, and $30 billion to $50 billion in China in 2030. The e-Scooter revenue model will also spike and is projected to rise by more than 20% amounting to approximately $5 billion.

And, with a necessity to move people away from high carbon prints, traffic and congestion issues brought about by car-centric transport systems in cities, more and more city planners are developing more bike/scooter lanes and adopting zero-emission plans. This is the force behind the booming electric scooter market and the numbers will only go higher and higher.

Companies that have taken advantage of the growing eScooter trend develop an appthat allows them to provide efficient eScooter services. Such an app enables them to be able to locate bike pick-up and drop points through fully integrated google maps.

List of Best Electric Bikes for Rental Business or Campus Facility 2020:

It’s clear that e scooters will increasingly become more common and the e-scooter business model will continue to grab the attention of manufacturers, investors, entrepreneurs. All this should go ahead with a quest to know what are some of the best electric bikes in the market especially for anyone who would want to get started in the electric bikes/scooters rental business.

We have done a comprehensive list of the best electric bikes! Each bike has been reviewed in depth and includes a full list of specs and a photo.

Billy eBike

mobile-best-electric-bikes-scooters https://www.kickstarter.com/projects/enkicycles/billy-were-redefining-joyrides

To start us off is the Billy eBike, a powerful go-anywhere urban electric bike that’s specially designed to offer an exciting ride like no other whether you want to ride to the grocery store, cafe, work or school. The Billy eBike comes in 4 color options – Billy Blue, Polished aluminium, Artic white, and Stealth black.

Price: $2490

Available countries

Available in the USA, Europe, Asia, South Africa and Australia.This item ships from the USA. Buyers are therefore responsible for any taxes and/or customs duties incurred once it arrives in your country.

Features

  • Control – Ride with confidence with our ultra-wide BMX bars and a hyper-responsive twist throttle.
  • Stealth- Ride like a ninja with our Gates carbon drive that’s as smooth as butter and maintenance-free.
  • Drive – Ride further with our high torque fat bike motor, giving a better climbing performance.
  • Accelerate – Ride quicker with our 20-inch lightweight cutout rims for improved acceleration.
  • Customize – Ride your own way with 5 levels of power control. Each level determines power and speed.
  • Flickable – Ride harder with our BMX /MotoX inspired geometry and lightweight aluminum package

Specifications

  • Maximum speed: 20 mph (32 km/h)
  • Range per charge: 41 miles (66 km)
  • Maximum Power: 500W
  • Motor type: Fat Bike Motor: Bafang RM G060.500.DC
  • Load capacity: 300lbs (136kg)
  • Battery type: 13.6Ah Samsung lithium-ion,
  • Battery capacity: On/off-bike charging available
  • Weight: w/o batt. 48.5lbs (22kg), w/ batt. 54lbs (24.5kg)
  • Front Suspension: Fully adjustable air shock, preload/compression damping /lockout
  • Rear Suspension: spring, preload adjustment
  • Built-in GPS

Why Should You Buy This?

  • Riding fun and excitement
  • Better climbing ability and faster acceleration.
  • Ride with confidence
  • Billy folds for convenient storage and transportation.
  • Shorty levers connect to disc brakes ensuring you stop on a dime
  • belt drives are maintenance-free and clean (no oil or lubrication needed)

**Who Should Ride Billy? **

Both new and experienced riders

**Where to Buy? **Local distributors or ships from the USA.

Genze 200 series e-Bike

genze-best-electric-bikes-scooters https://www.genze.com/fleet/

Featuring a sleek and lightweight aluminum frame design, the 200-Series ebike takes your riding experience to greater heights. Available in both black and white this ebike comes with a connected app, which allows you to plan activities, map distances and routes while also allowing connections with fellow riders.

Price: $2099.00

Available countries

The Genze 200 series e-Bike is available at GenZe retail locations across the U.S or online via GenZe.com website. Customers from outside the US can ship the product while incurring the relevant charges.

Features

  • 2 Frame Options
  • 2 Sizes
  • Integrated/Removable Battery
  • Throttle and Pedal Assist Ride Modes
  • Integrated LCD Display
  • Connected App
  • 24 month warranty
  • GPS navigation
  • Bluetooth connectivity

Specifications

  • Maximum speed: 20 mph with throttle
  • Range per charge: 15-18 miles w/ throttle and 30-50 miles w/ pedal assist
  • Charging time: 3.5 hours
  • Motor type: Brushless Rear Hub Motor
  • Gears: Microshift Thumb Shifter
  • Battery type: Removable Samsung 36V, 9.6AH Li-Ion battery pack
  • Battery capacity: 36V and 350 Wh
  • Weight: 46 pounds
  • Derailleur: 8-speed Shimano
  • Brakes: Dual classic
  • Wheels: 26 x 20 inches
  • Frame: 16, and 18 inches
  • Operating Mode: Analog mode 5 levels of Pedal Assist Thrott­le Mode

Norco from eBikestore

norco-best-electric-bikes-scooters https://ebikestore.com/shop/norco-vlt-s2/

The Norco VLT S2 is a front suspension e-Bike with solid components alongside the reliable Bosch Performance Line Power systems that offer precise pedal assistance during any riding situation.

Price: $2,699.00

Available countries

This item is available via the various Norco bikes international distributors.

Features

  • VLT aluminum frame- for stiffness and wheel security.
  • Bosch e-bike system – for their reliability and performance.
  • E-bike components – for added durability.
  • Hydraulic disc brakes – offer riders more stopping power for safety and control at higher speeds.
  • Practical design features – to add convenience and versatility.

Specifications

  • Maximum speed: KMC X9 9spd
  • Motor type: Bosch Active Line
  • Gears: Shimano Altus RD-M2000, SGS, 9 Speed
  • Battery type: Power Pack 400
  • Battery capacity: 396Wh
  • Suspension: SR Suntour suspension fork
  • Frame: Norco VLT, Aluminum, 12x142mm TA Dropouts

Bodo EV

bodo-best-electric-bikes-scootershttp://www.bodoevs.com/bodoev/products_show.asp?product_id=13

Manufactured by Bodo Vehicle Group Limited, the Bodo EV is specially designed for strong power and extraordinary long service to facilitate super amazing rides. The Bodo Vehicle Company is a striking top in electric vehicles brand field in China and across the globe. Their Bodo EV will no doubt provide your riders with high-level riding satisfaction owing to its high-quality design, strength, breaking stability and speed.

Price: $799

Available countries

This item ships from China with buyers bearing the shipping costs and other variables prior to delivery.

Features

  • Reliable
  • Environment friendly
  • Comfortable riding
  • Fashionable
  • Economical
  • Durable – long service life
  • Braking stability
  • LED lighting technology

Specifications

  • Maximum speed: 45km/h
  • Range per charge: 50km per person
  • Charging time: 8 hours
  • Maximum Power: 3000W
  • Motor type: Brushless DC Motor
  • Load capacity: 100kg
  • Battery type: Lead-acid battery
  • Battery capacity: 60V 20AH
  • Weight: w/o battery 47kg

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How Do I Pass the AWS Solutions Architect Associate Exam? Careerera

The AWS solutions architect associate exam is one of the most difficult certification exams in the world. There are many certifications for various things such as the PMP certification and the CISSP certification, but it is the AWS solutions architect associate exam which takes the crown when it comes to difficulty.

How to Qualify an AWS Certified Solutions Architect Associate Exam?

Naturally, given the difficulty of the exam many people wonder, “How Do I Pass the AWS Solutions Architect Associate Exam?” on the first attempt. This is a very valid question and, in this article, we will discuss all the ways in which one can maximize his chances of passing the AWS solutions architect associate exam in the first attempt.

Before starting we must remember one thing – the AWS platform is a beast of a platform and is vast beyond comprehension. So, for a beginner looking to take the AWS solutions architect associate exam it will not be possible to cover all the topics and services related to the AWS platform.

However, one can make one’s best attempt to cover all the core concepts and topics which are most relevant and pertinent to the AWS platform. A candidate for the AWS solutions architect associate exam in particular should keep himself updated on all the most recent advances and developments in the field of AWS.

Which services are tested most frequently on the exam?

  1. Amazon EC2 -

This service is used to create virtual machines which are offsite. It is also used to manage things such as ports, security, and storage because of its many features. It allows the users to utilize AWS’ vast computing capabilities on-demand. With a ‘scale as you grow’ philosophy the user is not trapped into an agreement in which they will have to purchase excessive resources from Amazon.
They only have to make use of as many resources as they need. The Amazon EC2 web interface allows the software developers to configure and resize the compute machines to their heart’s content with minimal friction and absolutely no confusion whatsoever. All decent AWS Solutions Architect Associate Certification courses teach how to make use of this service.

  1. Amazon RDS -

The full form of Amazon RDS is Amazon Relational Database Service. It is an extremely useful service launched by Amazon. It is used by software developers to create a database with all the features of a full-fledged offline database in a matter of minutes.

The main purpose of Amazon RDS is to set up relational databases in the cloud. These databases can be set up, operated, and scaled very easily and very smoothly. Amazon provides a very seamless and slick interface which is ideal for operating the databases thus created.

The databases are very cost-effective and can be resized very easily. They provide all facilities to carry out administrative tasks such as hardware provisioning, database setup, patching and backups. With the help of these databases, one will be able to give their applications fast performance, high availability, security and compatibility.

  1. Amazon S3 -

The full form of Amazon S3 is Amazon Simple Storage Service. It is a service which provides a lot of expediency to software developers in the matter of storage. Software developers can create objects through programming and they can then store those objects which they have coded into the Amazon S3 service.

This service is responsible in a large part for having made AWS the leading cloud services provider in the world. Truly Jeff Bezos must have been inspired by a divine vision when he conceived of this service. This service leads the industry in terms of scalability, data availability, security, and performance.

How difficult is the AWS solutions architect associate exam?

As we have mentioned before, the AWS platform is vast beyond comprehension. It contains multitudes of services and all of them have their own various configuration options and switches. This means that for a candidate who is just starting his journey of becoming a AWS certified solution architect associate it is not possible to master the whole platform immediately.

It will take many years and a lot of practical and hands-on experience before he is able to do so. But the AWS solutions architect associate exam has a very extensive syllabus and is thus prohibitively difficult for the candidates. Its syllabus contains the following domains of knowledge -

• Design Resilient Architectures - 34%
• Define Performant Architecture – 24%
• Specify Secure Applications and Architectures – 24%
• Design Cost-Optimized Architectures – 10%
• Define Operationally Excellent Architectures – 8%

Some tips which will help to clear the exam -

  1. Read as many AWS whitepapers as possible -

The AWS whitepapers explain many core concepts of the AWS platform in very technical, precise, and accurate language. For a candidate preparing for the AWS solutions architect associate exam, it is very beneficial to read the whitepapers as they will illuminate many technical and hard to grasp concepts of the AWS platform in a detailed and scientific way.

  1. Make use of the process of elimination for multiple correct answers -

On the AWS solutions architect associate exam there will be many questions which will have multiple options. For those questions the candidate should first try to identify and eliminate the incorrect options so that they have to contemplate a fewer number of options while trying to find the correct answer.

  1. Try to spot questions which have hints and details about other questions -

Many times, there will be questions on the exam which will contain hints and details pertinent to other questions on the exam. So, the candidate should keep a weather eye out for such questions and read all questions carefully with this aspect of the exam kept in mind firmly. This trick is taught in many AWS Solutions Architect Associate Certification courses.

  1. Take an AWS solution architect associate course -

The best way to pass the AWS solutions architect associate exam is to take an AWS solution architect associate course. This will help the candidate because they will be studying under the guidance of seasoned and experienced instructors who will be able to bring their world-class teaching skills and subject matter expertise to bear to make the learners fully prepared for the exam.

#how do i pass the aws solutions architect associate exam #how to qualify an aws certified solutions architect associate exam #aws solutions architect associate exam #aws solutions architect associate certification courses #aws certified solution architect associate #aws solution architect associate course

Carmen  Grimes

Carmen Grimes

1595494844

How to start an electric scooter facility/fleet in a university campus/IT park

Are you leading an organization that has a large campus, e.g., a large university? You are probably thinking of introducing an electric scooter/bicycle fleet on the campus, and why wouldn’t you?

Introducing micro-mobility in your campus with the help of such a fleet would help the people on the campus significantly. People would save money since they don’t need to use a car for a short distance. Your campus will see a drastic reduction in congestion, moreover, its carbon footprint will reduce.

Micro-mobility is relatively new though and you would need help. You would need to select an appropriate fleet of vehicles. The people on your campus would need to find electric scooters or electric bikes for commuting, and you need to provide a solution for this.

To be more specific, you need a short-term electric bike rental app. With such an app, you will be able to easily offer micro-mobility to the people on the campus. We at Devathon have built Autorent exactly for this.

What does Autorent do and how can it help you? How does it enable you to introduce micro-mobility on your campus? We explain these in this article, however, we will touch upon a few basics first.

Micro-mobility: What it is

micro-mobility

You are probably thinking about micro-mobility relatively recently, aren’t you? A few relevant insights about it could help you to better appreciate its importance.

Micro-mobility is a new trend in transportation, and it uses vehicles that are considerably smaller than cars. Electric scooters (e-scooters) and electric bikes (e-bikes) are the most popular forms of micro-mobility, however, there are also e-unicycles and e-skateboards.

You might have already seen e-scooters, which are kick scooters that come with a motor. Thanks to its motor, an e-scooter can achieve a speed of up to 20 km/h. On the other hand, e-bikes are popular in China and Japan, and they come with a motor, and you can reach a speed of 40 km/h.

You obviously can’t use these vehicles for very long commutes, however, what if you need to travel a short distance? Even if you have a reasonable public transport facility in the city, it might not cover the route you need to take. Take the example of a large university campus. Such a campus is often at a considerable distance from the central business district of the city where it’s located. While public transport facilities may serve the central business district, they wouldn’t serve this large campus. Currently, many people drive their cars even for short distances.

As you know, that brings its own set of challenges. Vehicular traffic adds significantly to pollution, moreover, finding a parking spot can be hard in crowded urban districts.

Well, you can reduce your carbon footprint if you use an electric car. However, electric cars are still new, and many countries are still building the necessary infrastructure for them. Your large campus might not have the necessary infrastructure for them either. Presently, electric cars don’t represent a viable option in most geographies.

As a result, you need to buy and maintain a car even if your commute is short. In addition to dealing with parking problems, you need to spend significantly on your car.

All of these factors have combined to make people sit up and think seriously about cars. Many people are now seriously considering whether a car is really the best option even if they have to commute only a short distance.

This is where micro-mobility enters the picture. When you commute a short distance regularly, e-scooters or e-bikes are viable options. You limit your carbon footprints and you cut costs!

Businesses have seen this shift in thinking, and e-scooter companies like Lime and Bird have entered this field in a big way. They let you rent e-scooters by the minute. On the other hand, start-ups like Jump and Lyft have entered the e-bike market.

Think of your campus now! The people there might need to travel short distances within the campus, and e-scooters can really help them.

How micro-mobility can benefit you

benefits-micromobility

What advantages can you get from micro-mobility? Let’s take a deeper look into this question.

Micro-mobility can offer several advantages to the people on your campus, e.g.:

  • Affordability: Shared e-scooters are cheaper than other mass transportation options. Remember that the people on your campus will use them on a shared basis, and they will pay for their short commutes only. Well, depending on your operating model, you might even let them use shared e-scooters or e-bikes for free!
  • Convenience: Users don’t need to worry about finding parking spots for shared e-scooters since these are small. They can easily travel from point A to point B on your campus with the help of these e-scooters.
  • Environmentally sustainable: Shared e-scooters reduce the carbon footprint, moreover, they decongest the roads. Statistics from the pilot programs in cities like Portland and Denver showimpressive gains around this key aspect.
  • Safety: This one’s obvious, isn’t it? When people on your campus use small e-scooters or e-bikes instead of cars, the problem of overspeeding will disappear. you will see fewer accidents.

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Why Business Cards Printing are essential for your business

No matter how technological advancement helps in communication but business card printing still worth it. Most businesses prefer to have and share business cards to develop a direct relationship with the potential market. It is an important part of the promotional and branding strategy and effectively described the brand’s nature. It gives ease in sharing the business-related information in the public like at conference, workshops and other.

This is image title

Moreover, a quality visiting card printing online provides the impression of products or services. According to the random research, it is stated that most of the customers draw the conclusion about the business and its products from the card quality or its printing. So, a smart business card with the right size and content is essential for the business.

Here are the factors that will help to understand the importance of the business card in the brand promotion or more:

Provide Contact Details:

One of the main reasons behind business card printing is the contact sharing features. The card contains contact details, name, logo, and other related information that helps the client to reach the business. Further, it helps to describe the brand or product nature before approaching the product or services. Other than the technology usage or sharing of the information through devices, business cards are most suitable and a handy item that worth a lot for the customers.

This is image title

The impression of the Brand:

The business card is a source that will deliver the first impression of the brand or business towards the potential buyers. It is something handy with the physical touch that develops a direct relationship with the potential market. While going to print business cards that quality, printing style, and overall outlook matters a lot. Because it works as the first impression of the business and its product or services for the potential market. So, the worthy card made with durable material and have an attractive color combination or layout can capture the interest easily.

It contains the company logo, name, design, and color combination that quickly attain the interest of the audience. On other hand, it is an important factor to pay attention to while making the designing and printing decision about the business card.

Direct Marketing Facility:

No doubt there are multiple marketing and promotional tools are available for the product or business promotion. But engraved business cards online is something incredible and handy that provide the physical touch experience. It works as the marketing or promotional element that helps in sharing the details directly to the potential market. With the more physical interaction that the business cards offer to the buyers and business.

The important thing that has to be considered in making the custom business cards, related to the content adjustment, design, and color combination. It helps to capture the buyer’s interest and deliver the right impression towards them.

This is image title

Appreciated in Different Cultures:

The business cards preferably deliver the right knowledge and impression about the product or services. It described the brand position, nature of the products or services, and other relevant skills. In most cultures, it is appreciated to have and share physical business cards as an information-sharing tool. In face-to-face interaction, develops a network and promotes sharing the business information in a circle.

Ease to Provide a Business Reference:

In business cards, online people find multiple opportunities in designing and Printing Services with a significant impression. It helps to make an easy referral related to particular services and a person with a skill set. The business car not only contains the address, contact information, or brand-related knowledge. It provides details about the particular person and reflects the skill set. Multiple factors truly help to describe the right impression of the brand through color, text, and images.

A tool to Develop Trust:

For business growth and development, it is important to gain the trust level of the customers. With the custom business cards, it is easier to attain the trust of the customers. in the competitive business atmosphere for a business survival trust is the only key, that can be over the product or on a company as well. Through the business card, it is easier to exchange and share personal warmth feelings.

With Business Cards Printing, it is easier to show more graphical representation through colors and design. Moreover, with the physical touch, it is easier to give trust feelings or more.

This is image title

Final Consideration!

In the competitive business world, the business card is a source to deliver information and capture the interest of potential buyers. It helps to impress the audience and provide relevant product details and skills that build trust or act as the direct promotional tool.

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Creación de una aplicación web Crud usando Angular | Angular 13 CRUD

Angular CRUD significa una aplicación que consiste en crear, leer, actualizar y eliminar funcionalidades de datos. Es la guía completa sobre la creación de aplicaciones web CRUD (crear, leer, actualizar, eliminar) utilizando el nuevo marco angular. Angular acaba de ser lanzado y viene con algunas características nuevas y mejoras.

Primero, instalaremos Angular usando Angular CLI, y luego continuaremos desarrollando el frontend y el backend.

1: Instale Angular y otras dependencias.

Si tiene una versión anterior de @angular/cli, puede ejecutar el siguiente comando para instalar las últimas versiones.

npm uninstall -g @angular/cli
npm cache verify
npm install -g @angular/cli

Si tiene algún problema, consulte mi Cómo actualizar Angular CLI a la versión 7Le ayudará a actualizar su Angular CLI y creará un nuevo proyecto Angular Seven.

Bien, ahora, si escribe el siguiente comando, puede ver que hemos actualizado Angular CLI.

Ejemplo de Angular 7 CRUD |  Tutorial de pila MEAN

Ahora, creará un nuevo proyecto Angular usando el siguiente comando.

ng new angular7crud
cd angular7crud

Ejemplo de CRUD de pila MEAN

Después de ingresar a la carpeta del proyecto, abra el proyecto en Visual Studio Code usando el siguiente comando. Si no lo estás usando, entonces comienza a usarlo. Es el mejor editor para el desarrollo de Javascript .

code .

En el momento de la instalación, hemos habilitado el enrutamiento para nuestra aplicación. Es nuevo en Angular  porque nos avisará mientras instalamos el repetitivo angular. Puede verificar el archivo llamado app-routing.module.ts  dentro del directorio src >> app .

A continuación, instale Bootstrap 4 CSS Framework usando el siguiente comando.

npm install bootstrap --save

Ahora, agréguelo dentro del  archivo angular.json  .

"styles": [
   "src/styles.css",
   "./node_modules/bootstrap/dist/css/bootstrap.min.css"
 ],

Entonces, ahora podemos usar las clases de Bootstrap 4 en nuestro proyecto. 

Inicie el servidor de desarrollo de Angular con el siguiente comando.

ng serve -o

 

Angular 7 Tutorial

Descripción del Proyecto

Crearemos un proyecto en el que los usuarios puedan ingresar su nombre de usuario  , nombre comercial  y número de GST desde el formulario y enviarlo. Si los valores son incorrectos, se validarán en la interfaz y el formulario no se enviará. Por otro lado, si todos los valores parecen perfectos, enviaremos el formulario a la API backend , almacenando los valores dentro de la base de datos de MongoDB .

Ahora, crearemos algunos componentes angulares para hacer el trabajo.

2: generar componentes angulares

Escriba el siguiente comando para generar componentes angulares . Realizaremos operaciones de creación, lectura y actualización. Entonces crearemos tres componentes.

ng g c gst-add --spec=false
ng g c gst-get --spec=false
ng g c gst-edit --spec=false

Tutorial CRUD angular

Los tres componentes se registran automáticamente dentro de un archivo app.module.ts  . Necesitamos configurar el enrutamiento de componentes angulares dentro de un archivo app-routing.module.ts  .

// app-routing.module.ts

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { GstAddComponent } from './gst-add/gst-add.component';
import { GstEditComponent } from './gst-edit/gst-edit.component';
import { GstGetComponent } from './gst-get/gst-get.component';

const routes: Routes = [
  {
    path: 'business/create',
    component: GstAddComponent
  },
  {
    path: 'business/edit/:id',
    component: GstEditComponent
  },
  {
    path: 'business',
    component: GstGetComponent
  }
];

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

export class AppRoutingModule { }

Ahora, puede ver dentro del  archivo app.component.html  que la directiva <router-outlet>  está ahí. Esta directiva nos ayuda a representar los diferentes componentes en función de la ruta URI.

3: Crea una Navegación Angular

Escriba el siguiente código dentro del  archivo app.component.html  .

<nav class="navbar navbar-expand-sm bg-light">
  <div class="container-fluid">
    <ul class="navbar-nav">
      <li class="nav-item">
        <a routerLink="business/create" class="nav-link" routerLinkActive="active">
          Create Business
        </a>
      </li>
      <li class="nav-item">
        <a routerLink="business" class="nav-link" routerLinkActive="active">
          Business
        </a>
      </li> 
    </ul>
  </div>
</nav>

<div class="container">
  <router-outlet></router-outlet>
</div>

Guarde el archivo y vaya al navegador y haga clic en dos enlaces. Puede ver que podemos ver los diferentes componentes en función de la navegación.

4: Instale el indicador de progreso de enrutamiento angular.

Escriba el siguiente comando para instalar la  biblioteca ng2-slim-loading-bar .

npm install ng2-slim-loading-bar --save

Entonces, si instala paquetes de terceros en este momento, no es compatible con Angular . Para cerrar la brecha entre  Angular  y los paquetes de terceros, necesitamos instalar la siguiente biblioteca. Eso es.

npm install rxjs-compat --save

Ahora, importe  SlimLoadingBarModule  dentro del  archivo app.module.ts  .

// app.module.ts

import { SlimLoadingBarModule } from 'ng2-slim-loading-bar';

imports: [
    ...
    SlimLoadingBarModule
],

El siguiente paso es incluir el estilo con la biblioteca dentro del archivo src >> styles.css  .

@import "../node_modules/ng2-slim-loading-bar/style.css";

5: Adición de eventos de enrutador.

Angular RouterModule nos da los siguientes módulos de eventos.

  1. Inicio de navegación
  2. Fin de navegación
  3. Error de navegación
  4. NavegaciónCancelar
  5. enrutador
  6. Evento

Ahora, escriba el siguiente código dentro del  archivo app.component.ts  .

// app.component.ts

import { Component } from '@angular/core';
import {SlimLoadingBarService} from 'ng2-slim-loading-bar';
import { NavigationCancel,
        Event,
        NavigationEnd,
        NavigationError,
        NavigationStart,
        Router } from '@angular/router';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'angular7crud';
  constructor(private _loadingBar: SlimLoadingBarService, private _router: Router) {
    this._router.events.subscribe((event: Event) => {
      this.navigationInterceptor(event);
    });
  }
  private navigationInterceptor(event: Event): void {
    if (event instanceof NavigationStart) {
      this._loadingBar.start();
    }
    if (event instanceof NavigationEnd) {
      this._loadingBar.complete();
    }
    if (event instanceof NavigationCancel) {
      this._loadingBar.stop();
    }
    if (event instanceof NavigationError) {
      this._loadingBar.stop();
    }
  }
}

Está haciendo que intercepte el evento de enrutamiento y agregue el componente de barra de carga a cada ruta para que podamos ver la indicación de enrutamiento cada vez que cambiamos las rutas.

El cambio final para mostrar el indicador de enrutamiento es agregar la directiva ng2-slim-loading-bar dentro del  archivo app.component.html  en la parte superior de la página.

<ng2-slim-loading-bar color="blue"></ng2-slim-loading-bar>

<nav class="navbar navbar-expand-sm bg-light">
  <div class="container-fluid">
    <ul class="navbar-nav">
      <li class="nav-item">
        <a routerLink="business/create" class="nav-link" routerLinkActive="active">
          Create Business
        </a>
      </li>
      <li class="nav-item">
        <a routerLink="business" class="nav-link" routerLinkActive="active">
          Business
        </a>
      </li> 
    </ul>
  </div>
</nav>

<div class="container">
  <router-outlet></router-outlet>
</div>

Guarde el archivo y vaya a la terminal para ver si hay un error y si no, vaya al navegador y cambie las rutas, y puede ver que ahora podemos ver el indicador de enrutamiento.

6: Agregar formulario Bootstrap

Dentro del  archivo gst-add.component.html  , agregue el siguiente  formulario de arranque 4 .

<div class="card">
  <div class="card-body">
    <form>
      <div class="form-group">
        <label class="col-md-4">Person Name</label>
        <input type="text" class="form-control" />
      </div>
      <div class="form-group">
        <label class="col-md-4">Business Name </label>
        <input type="text" class="form-control" />
      </div>
      <div class="form-group">
        <label class="col-md-4">Business GST Number </label>
        <input type="text" class="form-control" />
      </div>
      <div class="form-group">
        <button type="submit" class="btn btn-primary">Add Business</button>
      </div>
    </form>
  </div>
</div>

Demostración de Angular 7 CRUD

7: Agregar validación de formulario angular

Usaremos ReactiveFormsModule . Entonces, si es nuevo en Validación de formularios angulares , consulte mi artículo Validación de formularios angulares  en este blog.

Ahora, importe  ReactiveFormsModule  dentro del  archivo app.module.ts  .

// app.module.ts

import { ReactiveFormsModule } from '@angular/forms';

imports: [
    ...
    ReactiveFormsModule
],

Ahora, necesitamos escribir el código para el  archivo app.component.ts  . Recuerde, este no es un formulario basado en plantillas. Así que cambiaremos el código dentro del archivo app.component.ts  .

Primero, importamos los  módulos FormGroup, FormBuilder, Validators  desde  @angular/forms .

Además, cree un constructor y cree una instancia de  FormBuilder .

Así que escriba el siguiente código dentro del  archivo gst-add.component.ts  .

// gst-add.component.ts

import { Component, OnInit } from '@angular/core';
import { FormGroup,  FormBuilder,  Validators } from '@angular/forms';

@Component({
  selector: 'app-gst-add',
  templateUrl: './gst-add.component.html',
  styleUrls: ['./gst-add.component.css']
})
export class GstAddComponent implements OnInit {

  angForm: FormGroup;
  constructor(private fb: FormBuilder) {
    this.createForm();
  }

  createForm() {
    this.angForm = this.fb.group({
      person_name: ['', Validators.required ],
      business_name: ['', Validators.required ],
      business_gst_number: ['', Validators.required ]
    });
  }

  ngOnInit() {
  }

}

Hemos utilizado el generador de formularios para manejar toda la validación. Entonces, en ese constructor, estamos creando un formulario con las reglas de validación. En nuestro ejemplo, hay tres campos. Si el texto de entrada está vacío, dará un error y debemos mostrarlo.

Ahora, escribe el siguiente código dentro del  archivo gst-add.component.html  .

<div class="card">
  <div class="card-body">
    <form [formGroup]="angForm" novalidate>
      <div class="form-group">
        <label class="col-md-4">Person Name</label>
        <input type="text" class="form-control" formControlName="person_name" #person_name />
      </div>
      <div *ngIf="angForm.controls['person_name'].invalid && (angForm.controls['person_name'].dirty || angForm.controls['person_name'].touched)" class="alert alert-danger">
        <div *ngIf="angForm.controls['person_name'].errors.required">
          Person Name is required.
        </div>
      </div>
      <div class="form-group">
        <label class="col-md-4">Business Name </label>
        <input type="text" class="form-control" formControlName="business_name" #business_name />
      </div>
      <div *ngIf="angForm.controls['business_name'].invalid && (angForm.controls['business_name'].dirty || angForm.controls['business_name'].touched)" class="alert alert-danger">
        <div *ngIf="angForm.controls['business_name'].errors.required">
          Person Business is required.
        </div>
      </div>
      <div class="form-group">
        <label class="col-md-4">Business GST Number </label>
        <input type="text" class="form-control" formControlName="business_gst_number" #business_gst_number />
      </div>
      <div *ngIf="angForm.controls['business_gst_number'].invalid && (angForm.controls['business_gst_number'].dirty || angForm.controls['business_gst_number'].touched)" class="alert alert-danger">
        <div *ngIf="angForm.controls['business_gst_number'].errors.required">
          Business GST Number is required.
        </div>
      </div>
      <div class="form-group">
        <button type="submit" 
        [disabled]="angForm.pristine || angForm.invalid" 
        class="btn btn-primary">Add Business</button>
      </div>
    </form>
  </div>
</div>

Guarde el archivo y vaya al navegador, y puede ver si no pone ningún valor dentro del cuadro de entrada, verá los errores.

Ejemplo de validación de formulario de Angular 7

8: Configurar el HttpClientModule

Importe  HttpClientModule  dentro del  archivo app.module.ts  .

// app.module.ts

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

imports: [
   ...
    HttpClientModule
 ],

9: Crea un modelo.

Dentro de la  carpeta de la aplicación src >>  , cree un archivo llamado  Business.ts  y agregue el siguiente código.

// Business.ts

export default class Business {
  person_name: String;
  business_name: String;
  business_gst_number: Number;
}

10: Cree un archivo de servicio angular.

Escriba el siguiente comando para generar el archivo de servicio.

ng g service business --spec=false

Entonces, su archivo principal  business.service.ts  se ve así.

// business.service.ts

import { Injectable } from '@angular/core';

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

  constructor() { }
}

Ahora, importe el   archivo  business.service.ts al archivo app.module.ts  .

// app.module.ts

import { BusinessService } from './business.service';

providers: [ BusinessService ],

11: Envíe los datos al servidor del nodo

Necesitamos escribir el código que enviará la solicitud HTTP POST con los datos al servidor Node.js y guardar los datos en la base de datos MongoDB .

Escriba el siguiente código dentro del  archivo business.service.ts  .

// business.service.ts

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

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

  uri = 'http://localhost:4000/business';

  constructor(private http: HttpClient) { }

  addBusiness(person_name, business_name, business_gst_number) {
    const obj = {
      person_name: person_name,
      business_name: business_name,
      business_gst_number: business_gst_number
    };
    console.log(obj);
    this.http.post(`${this.uri}/add`, obj)
        .subscribe(res => console.log('Done'));
  }
}

Hemos definido nuestra URL de API de backend, pero aún no hemos creado ningún backend, pero lo haremos en un par de pasos.

Necesitamos agregar el evento de clic al botón Agregar negocio. Así que agregue el siguiente código dentro del archivo gst-add.component.html  .

<div class="form-group">
    <button (click)="addBusiness(person_name.value, business_name.value, business_gst_number.value)"
        [disabled]="angForm.pristine || angForm.invalid" 
        class="btn btn-primary">
        Add Business
     </button>
</div>

Entonces, cuando no hay errores, podemos enviar el formulario y llamará a la  función addBusiness  del componente . Desde allí, llamaremos al servicio angular y el servicio enviará la solicitud HTTP Post al servidor Node.js.

Ahora, agregue la  función addBusiness  dentro del  archivo gst-add.component.ts  . Así que escriba el siguiente código dentro  del archivo gst-add.component.ts  .

// gst-add.component.ts

import { Component, OnInit } from '@angular/core';
import { FormGroup,  FormBuilder,  Validators } from '@angular/forms';
import { BusinessService } from '../business.service';

@Component({
  selector: 'app-gst-add',
  templateUrl: './gst-add.component.html',
  styleUrls: ['./gst-add.component.css']
})
export class GstAddComponent implements OnInit {

  angForm: FormGroup;
  constructor(private fb: FormBuilder, private bs: BusinessService) {
    this.createForm();
  }

  createForm() {
    this.angForm = this.fb.group({
      person_name: ['', Validators.required ],
      business_name: ['', Validators.required ],
      business_gst_number: ['', Validators.required ]
    });
  }

  addBusiness(person_name, busines_name, business_gst_number) {
    this.bs.addBusiness(person_name, busines_name, business_gst_number);
  }

  ngOnInit() {
  }

}

Aquí, hemos definido la función y también importamos el  archivo business.service.ts  . A continuación, cree una instancia del objeto dentro del constructor y llame a la función del archivo businsess.service.ts .

Ya codificamos la  función addBusiness  dentro del  archivo business.service.ts  . Ahora, necesitamos configurar la API de backend.

12: Cree una API de back-end de Node.js

Dentro de la carpeta raíz angular, cree una carpeta llamada api y vaya dentro de esa carpeta. Recuerde, será un proyecto completamente separado de Angular. Entonces sus node_modules son diferentes de un Angular .

Abra la terminal dentro de la  carpeta api  y escriba el siguiente comando.

npm init -y

Instale los siguientes módulos específicos del nodo.

npm install --save express body-parser cors mongoose

No reinicio el servidor de nodos cada vez; Cambio el archivo. Así que estoy instalando el servidor nodemon. Lo que hace es que cuando modifico el archivo server.js  , reinicia el  servidor node.js  automáticamente.

npm install nodemon --save-dev

Ahora, dentro de la  carpeta api  , cree un archivo llamado  server.js  .

// server.js

const express = require('express'),
    path = require('path'),
    bodyParser = require('body-parser'),
    cors = require('cors'),
    mongoose = require('mongoose');

    const app = express();
    let port = process.env.PORT || 4000;

    const server = app.listen(function(){
        console.log('Listening on port ' + port);
    });

Lo siguiente es conectar la base de datos MongoDB con nuestra aplicación node.js.

Si no ha instalado la base de datos MongoDB, instálela e inicie el servidor mongodb.

Escriba el siguiente comando para iniciar el   servidor MongoDB .

mongod

Entonces, ahora, me he conectado a la base de datos.

Cree un archivo llamado  DB.js  dentro  de la carpeta del proyecto raíz de API  . Luego, escriba el siguiente código dentro del archivo DB.js. 

// DB.js

module.exports = {
    DB: 'mongodb://localhost:27017/ng7crud'
 };

Importe este  archivo DB.js  dentro de nuestro  archivo server.js y use la  biblioteca mongoose  para configurar la  conexión de la base de datos  con  MongoDB . También podemos usar Mongoose para guardar los datos en la base de datos usando Mongoose ORM.

Escriba el siguiente código dentro del archivo server.js  para conectar nuestra  aplicación  MongoDB  al servidor Node.js. 

// server.js

const express = require('express'),
    path = require('path'),
    bodyParser = require('body-parser'),
    cors = require('cors'),
    mongoose = require('mongoose'),
    config = require('./DB');

    mongoose.Promise = global.Promise;
    mongoose.connect(config.DB, { useNewUrlParser: true }).then(
      () => {console.log('Database is connected') },
      err => { console.log('Can not connect to the database'+ err)}
    );

    const app = express();
    app.use(bodyParser.json());
    app.use(cors());
    const port = process.env.PORT || 4000;

    const server = app.listen(port, function(){
     console.log('Listening on port ' + port);
    });

Guarde el archivo y vaya a la terminal e inicie el servidor de nodos.

nodemon server

Entonces, en este momento, tiene tres servidores en ejecución.

  1. Servidor de desarrollo angular
  2. servidor nodemon
  3. Servidor MongoDB

Recuerde, los tres servidores funcionan bien sin ningún error; de lo contrario, nuestra aplicación no funcionará.

Paso 13: Crea un modelo y rutas para nuestra aplicación.

Necesitamos crear dos carpetas dentro de la carpeta raíz de api llamadas rutas y modelos .

En la carpeta de modelos  , cree un modelo llamado  Business.js.

// Business.js

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

// Define collection and schema for Business
let Business = new Schema({
  person_name: {
    type: String
  },
  business_name: {
    type: String
  },
  business_gst_number: {
    type: Number
  }
},{
    collection: 'business'
});

module.exports = mongoose.model('Business', Business);

Entonces, hemos definido nuestro esquema para la colección de negocios. Tenemos tres campos llamados  person_name, business_name, business_gst_number.

En la  carpeta de rutas  , cree un archivo llamado business.route.js.

Escriba el código CRUD dentro del  archivo business.route.js  .

// business.route.js

const express = require('express');
const app = express();
const businessRoutes = express.Router();

// Require Business model in our routes module
let Business = require('../models/Business');

// Defined store route
businessRoutes.route('/add').post(function (req, res) {
  let business = new Business(req.body);
  business.save()
    .then(business => {
      res.status(200).json({'business': 'business in added successfully'});
    })
    .catch(err => {
    res.status(400).send("unable to save to database");
    });
});

// Defined get data(index or listing) route
businessRoutes.route('/').get(function (req, res) {
    Business.find(function (err, businesses){
    if(err){
      console.log(err);
    }
    else {
      res.json(businesses);
    }
  });
});

// Defined edit route
businessRoutes.route('/edit/:id').get(function (req, res) {
  let id = req.params.id;
  Business.findById(id, function (err, business){
      res.json(business);
  });
});

//  Defined update route
businessRoutes.route('/update/:id').post(function (req, res) {
    Business.findById(req.params.id, function(err, next, business) {
    if (!business)
      return next(new Error('Could not load Document'));
    else {
        business.person_name = req.body.person_name;
        business.business_name = req.body.business_name;
        business.business_gst_number = req.body.business_gst_number;

        business.save().then(business => {
          res.json('Update complete');
      })
      .catch(err => {
            res.status(400).send("unable to update the database");
      });
    }
  });
});

// Defined delete | remove | destroy route
businessRoutes.route('/delete/:id').get(function (req, res) {
    Business.findByIdAndRemove({_id: req.params.id}, function(err, business){
        if(err) res.json(err);
        else res.json('Successfully removed');
    });
});

module.exports = businessRoutes;

Hemos utilizado el modelo mangosta para guardar, actualizar y eliminar la base de datos. Mongoose es un ORM utilizado en la base de datos MongoDB . Tenemos todas las operaciones CRUD configuradas en el archivo de ruta; necesitamos importarlos dentro del archivo server.js  .

Entonces, nuestro  archivo server.js  final se ve así.

// server.js

const express = require('express'),
    path = require('path'),
    bodyParser = require('body-parser'),
    cors = require('cors'),
    mongoose = require('mongoose'),
    config = require('./DB');

const businessRoute = require('./routes/business.route');
mongoose.Promise = global.Promise;
mongoose.connect(config.DB, { useNewUrlParser: true }).then(
  () => {console.log('Database is connected') },
  err => { console.log('Can not connect to the database'+ err)}
);

const app = express();
app.use(bodyParser.json());
app.use(cors());
app.use('/business', businessRoute);
const port = process.env.PORT || 4000;

const server = app.listen(port, function(){
  console.log('Listening on port ' + port);
});

Paso 14: probar la funcionalidad de almacenar datos

Si todos los servidores están en funcionamiento, puede ir al navegador, completar los datos del formulario y agregar el negocio. Puede ver algo como esto en su pantalla si tiene éxito.

Ahora, podemos verificar la base de datos usando los siguientes comandos.

Primero, abra el shell de mongo en la cuarta pestaña porque las otras tres pestañas están ocupadas en este momento.

mongo

Aquí, podemos ver que los valores se almacenan en la base de datos MongoDB. ¡¡Sí!! Hemos tenido éxito.

Ahora, las operaciones restantes son Leer, Actualizar y Eliminar.

15: Mostrar los datos en la interfaz

En el archivo gst-get.component.html  , escriba el siguiente código.

<table class="table table-hover">
  <thead>
  <tr>
      <td>Person Name</td>
      <td>Business Name</td>
      <td>GST Number</td>
      <td colspan="2">Actions</td>
  </tr>
  </thead>

  <tbody>
      <tr *ngFor="let business of businesses">
          <td>{{ business.person_name }}</td>
          <td>{{ business.business_name }}</td>
          <td>{{ business.business_gst_number }}</td>
          <td><a [routerLink]="['/edit', business._id]" class="btn btn-primary">Edit</a></td>
          <td><a [routerLink]="" class="btn btn-danger">Delete</a></td>
      </tr>
  </tbody>
</table>

Ahora, dentro del  archivo business.service.ts  , necesitamos escribir la función que obtiene los datos comerciales de la  base de datos MongoDB y los muestra en la aplicación Angular .

// business.service.ts

getBusinesses() {
    return this
           .http
           .get(`${this.uri}`);
  }

Necesitamos incluir este archivo business.service.ts  y el archivo Business.ts  dentro del archivo  gst-get.component.ts  .

Escriba el siguiente código dentro del  archivo gst-get.component.ts  .

// gst-get.component.ts

import { Component, OnInit } from '@angular/core';
import Business from '../Business';
import { BusinessService } from '../business.service';

@Component({
  selector: 'app-gst-get',
  templateUrl: './gst-get.component.html',
  styleUrls: ['./gst-get.component.css']
})
export class GstGetComponent implements OnInit {

  businesses: Business[];

  constructor(private bs: BusinessService) { }

  ngOnInit() {
    this.bs
      .getBusinesses()
      .subscribe((data: Business[]) => {
        this.businesses = data;
    });
  }
}

Guarde el archivo, vaya al navegador y cambie a esta URL:  http://localhost:4200/business. Puedes ver el listado de las empresas.

16: Editar y actualizar datos

Bien, primero, necesitamos obtener los datos de la base de datos MongoDB usando _id wise y mostrar esos datos en el archivo gst-edit.component.html  .

Primero, escriba el siguiente código dentro del  archivo gst-edit.component.ts  .

// gst-edit.component.ts

import { Component, OnInit } from '@angular/core';
import { ActivatedRoute, Router } from '@angular/router';
import { FormGroup,  FormBuilder,  Validators } from '@angular/forms';
import { BusinessService } from '../business.service';

@Component({
  selector: 'app-gst-edit',
  templateUrl: './gst-edit.component.html',
  styleUrls: ['./gst-edit.component.css']
})
export class GstEditComponent implements OnInit {

  business: any = {};
  angForm: FormGroup;

  constructor(private route: ActivatedRoute,
    private router: Router,
    private bs: BusinessService,
    private fb: FormBuilder) {
      this.createForm();
 }

  createForm() {
    this.angForm = this.fb.group({
        person_name: ['', Validators.required ],
        business_name: ['', Validators.required ],
        business_gst_number: ['', Validators.required ]
      });
    }


  ngOnInit() {
    this.route.params.subscribe(params => {
        this.bs.editBusiness(params['id']).subscribe(res => {
          this.business = res;
      });
    });
  }
}

Aquí, cuando el  componente gst-edit.ts  se procesa , llamará al  método ngOnInit  y enviará una solicitud HTTP al servidor del nodo y obtendrá los datos de un _id para mostrarlos dentro del  archivo gst-edit.component.html  .

Ahora, dentro del  archivo business.service.ts  , necesitamos codificar la  función editBusiness  para enviar una solicitud HTTP.

// business.service.ts

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

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

  uri = 'http://localhost:4000/business';

  constructor(private http: HttpClient) { }

  addBusiness(person_name, business_name, business_gst_number) {
    const obj = {
      person_name: person_name,
      business_name: business_name,
      business_gst_number: business_gst_number
    };
    this.http.post(`${this.uri}/add`, obj)
        .subscribe(res => console.log('Done'));
  }

  getBusinesses() {
    return this
           .http
           .get(`${this.uri}`);
  }

  editBusiness(id) {
    return this
            .http
            .get(`${this.uri}/edit/${id}`);
    }
}

Finalmente, necesitamos escribir el formulario dentro del archivo gst-edit.component.html  .

<div class="card">
  <div class="card-body">
    <form [formGroup]="angForm" novalidate>
      <div class="form-group">
        <label class="col-md-4">Person Name</label>
        <input type="text" class="form-control" formControlName="person_name" #person_name [(ngModel)] = "business.person_name" />
      </div>
      <div *ngIf="angForm.controls['person_name'].invalid && (angForm.controls['person_name'].dirty || angForm.controls['person_name'].touched)" class="alert alert-danger">
        <div *ngIf="angForm.controls['person_name'].errors.required">
          Person Name is required.
        </div>
      </div>
      <div class="form-group">
        <label class="col-md-4">Business Name </label>
        <input type="text" class="form-control" formControlName="business_name" #business_name [(ngModel)] = "business.business_name" />
      </div>
      <div *ngIf="angForm.controls['business_name'].invalid && (angForm.controls['business_name'].dirty || angForm.controls['business_name'].touched)" class="alert alert-danger">
        <div *ngIf="angForm.controls['business_name'].errors.required">
          Person Business is required.
        </div>
      </div>
      <div class="form-group">
        <label class="col-md-4">Business GST Number </label>
        <input type="text" class="form-control" formControlName="business_gst_number" #business_gst_number [(ngModel)] = "business.business_gst_number" />
      </div>
      <div *ngIf="angForm.controls['business_gst_number'].invalid && (angForm.controls['business_gst_number'].dirty || angForm.controls['business_gst_number'].touched)" class="alert alert-danger">
        <div *ngIf="angForm.controls['business_gst_number'].errors.required">
          Business GST Number is required.
        </div>
      </div>
      <div class="form-group">
        <button (click)="updateBusiness(person_name.value, business_name.value, business_gst_number.value)"
        [disabled]="angForm.invalid" 
        class="btn btn-primary">Update Business</button>
      </div>
    </form>
  </div>
</div>

Guarde el archivo, vaya a la página de listado, haga clic en el botón editar y vea el formulario completo de la base de datos.

También puede ver la advertencia como la siguiente. Ignora este tutorial de demostración.

forms.js:1193
Parece que está usando ngModel en el mismo campo de formulario que formControlName.
La compatibilidad con el uso de la propiedad de entrada ngModel y el evento ngModelChange con
directivas de formulario reactivo quedó obsoleta en Angular v6 y se eliminó
en Angular v7.

Ahora, actualice los datos. Dentro del archivo  business.service.ts  , necesitamos escribir la función que actualiza los datos.

// business.service.ts

updateBusiness(person_name, business_name, business_gst_number, id) {

    const obj = {
        person_name: person_name,
        business_name: business_name,
        business_gst_number: business_gst_number
      };
    this
      .http
      .post(`${this.uri}/update/${id}`, obj)
      .subscribe(res => console.log('Done'));
  }

Bien, ahora escribe la  función updateBusiness()  dentro del archivo gst-edit.component.ts  .

// gst-edit.component.ts

updateBusiness(person_name, business_name, business_gst_number) {
   this.route.params.subscribe(params => {
      this.bs.updateBusiness(person_name, business_name, business_gst_number, params['id']);
      this.router.navigate(['business']);
});

Guarde el archivo y podrá actualizar los datos.

17: Eliminar los datos.

Entonces, si no encuentra ningún error en la consola, puede actualizar los datos con éxito.

Ya he escrito un servicio de edición actualización  para hacer llamadas a la API. Entonces, hasta ahora, Crear, Leer, Actualizar  está completo de este  ejemplo de Angular CRUD . Ahora, eche un vistazo a  Eliminar .

Necesitamos definir el evento de clic en el botón Eliminar dentro del archivo  gst-get.component.html  .

<tr *ngFor="let business of businesses">
          <td>{{ business.person_name }}</td>
          <td>{{ business.business_name }}</td>
          <td>{{ business.business_gst_number }}</td>
          <td><a [routerLink]="['edit', business._id]" class="btn btn-primary">Edit</a></td>
          <td><a (click) = "deleteBusiness(business._id)" class="btn btn-danger">Delete</a></td>
</tr>

Ahora, escriba la  función deleteBusiness  dentro del  archivo gst-get.component.ts  .

// gst-get.component.ts

deleteBusiness(id) {
    this.bs.deleteBusiness(id).subscribe(res => {
      console.log('Deleted');
    });
  }

Finalmente, cree la función deleteBusiness()  dentro del archivo business.service.ts  .

// business.service.ts

deleteBusiness(id) {
    return this
              .http
              .get(`${this.uri}/delete/${id}`);
  }

Finalmente, completé la funcionalidad de eliminación.

Entonces, en este tutorial, hemos completado la funcionalidad CRUD en Angular.