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Discover efficient strategies to eliminate repetitive checks in Laravel Blade templates. Learn how to streamline your code for checkboxes and selects in Laravel 8.
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How to Avoid Checking If a Variable is Set in Blade Template for Laravel 8

In the world of web development using Laravel, particularly with Blade templates, developers often find themselves in situations where they need to check if a variable is set before using it. This can lead to repetitive checks in code that not only clutter the view files but also make them harder to read. In this post, we’ll explore how to streamline your Laravel Blade templates, focusing on checkboxes and select inputs, while ensuring that you handle cases where input data may need to be retained.

The Problem

When working with forms in Laravel, especially when handling user input, you may encounter scenarios where you want to determine whether a variable, such as $page, is set before attempting to use its properties. This typically becomes cumbersome in view files, leading to cumbersome conditions like:

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

These checks can take away from the readability of the code. Thus, we need an efficient, cleaner way to manage these variable checks.

The Solution: Type Hinting in the Controller

One straightforward way to solve this problem is by using type hinting in your controller. By doing so, you can eliminate the need to check if a variable is set directly in your Blade templates.

Step 1: Modify Your Controller

In your Laravel controller, add type hinting to the method that serves your form. Here’s an example:

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

This change allows Laravel to automatically provide a new instance of the Page entity when create is called, thus ensuring that you don’t need to worry about whether $page is set or not. You can safely use $page->custom_template without needing to check if $page exists.

Step 2: Update the Blade View

With the controller set, you can now simplify your Blade view. Replace your select dropdown logic with the following code:

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

In this code snippet:

Simplified Logic: You directly use the $page->custom_template without any checks.

Using Old Input: The old('custom_template', $page->custom_template) function ensures that if the user made an input during the last form submission, that input will remain selected after the page reloads.

Benefits of This Approach

Cleaner Code: Your Blade templates remain uncluttered, allowing for better readability and easier maintenance.

Flexibility: You can use the same Blade view for both creating and editing resources, as the logic for retaining old input and setting default values remains consolidated.

Reduced Error Prone: By avoiding unnecessary checks, you reduce the risk of introducing errors in your logic.

Conclusion

By utilizing type hinting in your controllers and simplifying your Blade views, you can significantly improve the clarity and efficiency of your Laravel applications. Implementing these best practices will not only save you time but also enhance the overall quality of your codebase.

Feel free to experiment with these techniques and see how they can smooth out your development workflow in Laravel 8!