Скачать или смотреть How to Achieve Relative Navigation in Angular After an Observable Call

Discover how to implement relative navigation in Angular effectively after a REST call, ensuring seamless user experience in your application.
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This video is based on the question https://stackoverflow.com/q/64670536/ asked by the user 'Jonathan' ( https://stackoverflow.com/u/2886612/ ) and on the answer https://stackoverflow.com/a/64671160/ provided by the user 'Igor Nowosad' ( https://stackoverflow.com/u/6599826/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Achieve Relative Navigation in Angular After an Observable Call

Navigating within an Angular application after making a REST call can sometimes be tricky, especially when dealing with different URL structures. This is particularly true when the component can be accessed from multiple routes. If you’ve encountered issues with relative navigation in Angular and need a seamless way to redirect users within the same hierarchical structure, you’re in the right place!

The Problem: Relative Navigation Doesn't Work as Expected

You may have found yourself in a situation similar to this:

In your Angular application, you're working with a service that performs a REST call, and after successfully getting the response, you need to redirect the user to a relative path. The issue arises when your relative navigation doesn't function correctly, even though your logs indicate that the method is being triggered.

Here's a snippet of the original issue:

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

Although you see the log output, the navigation doesn't occur as expected. Why is this?

The Solution: Adjusting the Navigation Logic

To effectively perform a relative navigation after your REST call, you need to tweak the navigation logic slightly. Instead of using the current activated route directly for navigation, you can use its parent route.

Step-by-Step Solution

Identify the Current Route: Understand the route hierarchy and where your current component sits in relation to its parent.

Modify the Navigation Command: Change your navigation code from this:

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

To using the parent route like this:

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

Why the Change Works

Relative to Parent: By using this.activatedRoute.parent, you're directing Angular to look at the parent route when determining where to navigate. This ensures that you’re maintaining the relative context correctly.

Navigating .: Using ['.'] indicates you want to stay in the current route but notify Angular to refresh or update the view under the existing route path.

Implementation Example

Here’s an example of how your modified method would look like:

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

Now, when the REST call completes, the navigation should occur correctly, ensuring that users will not remain stuck in the same view.

Conclusion

Navigating through routes in Angular can be challenging, particularly when handling relative paths after asynchronous operations. By adjusting the navigation to point to the parent route and utilizing the current context properly, you can easily perform relative navigation after an Observable subscription. This adjustment not only enhances the user experience but also keeps your routing logic clean and efficient.

If you encounter further issues or have questions, feel free to reach out or consult the Angular documentation for more insights!