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Learn how to transform your Angular form inputs into a structured array of objects, improving data management and usability.
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How to Get an Array of Objects from an Angular Form Using Reactive Forms

When working with forms in Angular, you might find yourself wanting to collect data not just as simple strings, but in a more structured format. The scenario often arises when you have multiple inputs that represent related data, and you want to organize that data into an array of objects. If you've faced the problem where your form returns an array of strings instead of that structured object format, you're not alone.

In this guide, we will delve into how to configure your Angular form to return data structured as an array of objects. By the end, you'll not only understand how to do it but also gain insights into the flexibility of Angular's reactive forms.

The Problem

Consider the initial setup of your Angular form. You might have implemented something like this:

[[See Video to Reveal this Text or Code Snippet]]

Your current TypeScript code may resemble:

[[See Video to Reveal this Text or Code Snippet]]

This setup produces an output structured like this:

[[See Video to Reveal this Text or Code Snippet]]

But what you truly want is something more organized like this:

[[See Video to Reveal this Text or Code Snippet]]

The Solution

Step 1: Update the HTML Structure

To achieve the desired output, the first step is to revise the HTML structure of the form. We need to encapsulate the pairs of inputs within their own formGroup, which will allow us to maintain their relationship in the final data structure.

Here's how the HTML should look:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Update the TypeScript Code

Once you've adjusted the HTML, the next step is to refactor the TypeScript code to create dynamic form groups for each pair of inputs.

Here’s the modified TypeScript code:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Adding and Removing Inputs

In this approach, we also have functions to dynamically add or remove pairs of inputs as needed. This approach not only allows for flexibility but keeps the code clean and manageable.

Conclusion

By restructuring your Angular forms in this manner, you can effectively transform your array of input values into a clearly organized array of objects. This not only enhances the data management aspect of your application but also improves its usability.

Bonus Question: Do We Always Need Reactive Forms in Angular?

While reactive forms provide powerful features such as dynamic form handling and validation, it's not strictly necessary to use them. You can certainly create forms using basic HTML attributes and JavaScript validations; however, the reactive forms approach offers greater flexibility and scalability, especially for complex forms.

If you have any questions or need further clarification about any of the steps above, feel free to leave a comment!