How can nested arrays be utilized in Angular 2 reactive forms?

After successfully using a tutorial to create reactive forms in Angular 2, I encountered a new challenge. The tutorial helped me set up an 'Organisation' form with an array of 'Contact' groups, but now I am struggling to add an array within each 'Contact' group for 'Email' groups.

If anyone has come across a similar situation or knows of a resource that can guide me through this process, I would greatly appreciate any advice or pointers.

Answer №1

After following the provided tutorial, I successfully created an 'Organization' form that can include multiple 'Contact' groups. However, I encountered difficulties in extending this setup to allow each 'Contact' group to have its own set of 'Email' groups.

The tutorial offers comprehensive guidance on achieving your goal.

To implement the desired structure, consider the following steps:

https://i.sstatic.net/peW5d.png

Begin by setting up a component (e.g., `AppComponent`) where you define the root `FormGroup` as shown below named `trustForm`.

app.component.ts

 // Code snippet for AppComponent 

In this component, you will find methods to handle the root `FormArray` named `contracts` effectively.

Next, customize the HTML template for the `AppComponent` as demonstrated in the tutorial, ensuring to use the appropriate `FormArray` name.

Subsequently, create a separate component called `ContractComponent` to manage individual contracts within the 'Organization' form using a nested `FormArray` for `emails`.

contract.component.ts

 // Code snippet for ContractComponent

Similarly, adjust the HTML template for the `ContractComponent` to accommodate the `emails` array and provide functionality for adding and removing email entries.

Lastly, finalize the setup by implementing an `EmailComponent` to specify the fields required for each email entry.

email.component.ts

// Code snippet for EmailComponent

Then, populate the HTML template for the `EmailComponent` with the necessary input fields such as 'Text' for emails.

You can access the complete example on Plunker here.

If you prefer a more modular approach where each component manages its functionality independently, review the advanced Plunker Example.

For those interested in template-driven forms, check out the insightful article on creating nested template-driven forms in Angular:

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

The PDF format is experiencing compatibility issues when used with the CSS property for page breaks after:

My PDF with CSS page breaks is not functioning properly, as the pages are not breaking as intended. Removing position:absolute solves the issue but leaves space after each page. I suspect it may be a CSS problem, but I'm unsure. If the issue lies wit ...

I'm having trouble getting my button to work with addEventListener while using Ejs and Express. What could

Creating a Twitter-like platform where I can post tweets and have them display on the same page has been quite challenging. I've set up each post to have an Edit button initially hidden with 'display:none'. However, when I try to click on th ...

Having trouble manipulating text or values of angular elements with Selenium and Python

https://i.stack.imgur.com/vZdo0.png I am facing an issue with a date input field that does not have a calendar or dropdown for selection. I tried using driver.find_element_by_id('dataInicio').send_keys(date_value) but it doesn't seem to work ...

Unique text: "Enhancing User Interaction: Using a custom directive to dynamically evaluate

Introduction: A simple demonstration of HTML structure: <td ng-repeat="col in cols"> <div ng-bind-html="col.safeHTML"></div> </td> JavaScript controller code snippet: $scope.cols = [ { field : 'logo&apos ...

What is the method to allocate the smallest available number that has not yet been assigned?

As I'm dynamically generating elements and adding them to the page, each element needs a unique numerical id. However, due to non-linear removal of elements, there can be gaps in the assigned ids. For example... In one scenario: 1, 3, 4, 5, 16, 22. ...

Clicking on a button will allow me to select only a portion of text within a specific cell of

Inside a table, there is a paragraph of text enclosed in a <td></td> element. Take for example the following passage. Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard ...

The React application deployed on GitHub Pages is displaying a blank white screen

I developed a simple meme generator app in React.js as an exercise to learn web development, but I am facing issues while trying to host it on Github pages. I followed all the necessary steps such as installing gh-pages with node, updating packages.json wi ...

Ways to extract metadata from a given URL

Recently, I've delved into the world of JavaScript and I'm looking to extract metadata from a given URL. Whenever a URL is entered into an input field, I want to retrieve its meta data - a simple task in HTML using JavaScript. However, every time ...

Tips for integrating Laravel's blade syntax with Vuejs

Can you guide me on integrating the following Laravel syntax into a Vue.js component? @if(!Auth::guest()) @if(Auth::user()->id === $post->user->id) <a href=#>edit</a> @endif @endif ...

Error encountered during ng update process: The workspace root directory is unable to resolve the "@angular-devkit/schematics" package

ng update The error message stating that the "@angular-devkit/schematics" package cannot be found in the workspace root directory suggests a possible issue with the node modules structure. To address this, you can start by deleting bo ...

Discovering the ins and outs of utilizing Validator.pattern in Angular 9

BGroup = new FormGroup({ test: new FormControl(null, [Validators.required, Validators.pattern("[0-9]*$")]) }); Greetings! I am currently using Angular 9 and I have a question. How can I define a pattern that only accepts decimal numbers? Speci ...

Retrieve GPS data source details using Angular 2

In my Angular 2 application, I am looking to access the GPS location of the device. While I am aware that I can utilize window.geolocation.watchposition() to receive updates on the GPS position, I need a way to distinguish the source of this information. ...

Issue encountered with websocket connection while attempting to include dependencies

My current project involves integrating charts for the graphical component using React within an Electron software. I've added interaction with buttons (sections) to insert different data into the graphs based on user clicks on one of the sections. Th ...

Mastering the art of passing props in VueJS

My setup in the App is quite straightforward, with two main components: The HelloWorld component and a dialog component. The dialog component receives props from the HelloWorld component. The data in the HelloWorld component is rendered by looping over an ...

Allow specific HTML tags to be unescaped in Vue.js

Utilizing the v-html method to unescape HTML tags, I am seeking a way to only unescape the <a></a> tags within a string. To illustrate this: Input: <p> Hello World </p> <a target="_blank" href="https://www.google. ...

Enhance the connectivity of Angular js by activating the link function post transclusion

I am facing an issue with Angular where I have two directives that need to be transcluded within each other. However, I am unable to access the DOM using a simple JQuery selector after the transclude function has been executed. Specifically, I need to comp ...

Sharing assets across different Angular applications is a powerful way to improve code

I am currently developing a series of small applications that will utilize common modules and shared assets. For guidance on how to structure the projects, refer to this answer: The organization of my project folders is as follows: -root --projects ---ap ...

What is the process for searching a specific column in a Vuetify v-data-table that is not included in the headers?

Header for Product Data: headers: [ { text: "Product Name", value: "name" }, { text: "Quantity", value: "quantity" }, { text: "Price", value: "price" }, { text: "Orders", value: &quo ...

I am looking to send a combination of string and HTML data to the controller when using the Summernote editor in MVC

As a beginner in MVC development, there are certain aspects that I am still struggling with. Currently, I am using the Summernote Editor to compose blog posts and Ajax to submit them. However, I encountered an issue when trying to send both HTML data from ...

Exploring the Access Method for a Different Addon

Seeking to streamline my Dashboard using Google Analytics Data. I've been utilizing this Addon https://developers.google.com/analytics/solutions/google-analytics-spreadsheet-add-on to retrieve the necessary data. Is there a way to interact with the me ...