Laravel Filament: Unlocking the Secret to Getting the Active Tab in beforeValidation()

Are you tired of scratching your head, trying to figure out how to get the active tab in Laravel Filament’s `beforeValidation()` method? Well, you’re in luck because today, we’re about to demystify this puzzle and provide a step-by-step guide on how to achieve this seemingly impossible feat.

The Problem: Why Do We Need the Active Tab in beforeValidation()?

In Filament, each form is composed of multiple tabs, and each tab can contain various fields. When submitting a form, the `beforeValidation()` method is triggered, allowing us to perform some magic before the validation process kicks in. However, in this method, we don’t have direct access to the active tab, which can limit our ability to perform tab-specific operations.

But fear not, dear reader! We’re about to explore a clever solution to this problem, and by the end of this article, you’ll be able to effortlessly retrieve the active tab in the `beforeValidation()` method.

The Solution: Using the Power of JavaScript and Filament’s Events

The key to solving this problem lies in harnessing the power of JavaScript and Filament’s events. We’ll create a custom JavaScript function that will store the active tab’s ID in a hidden field, which we can then access in the `beforeValidation()` method.

Step 1: Add a Hidden Field to Your Form

In your Filament form, add a hidden field that will store the active tab’s ID. You can do this by adding the following code to your form’s `fields()` method:

<?php

namespace App\Filament\Resources\ExampleResource\Pages\ExamplePage;

use Filament\Forms\Components\Hidden;
use Filament\Forms\Components\Tabs;
use Filament\Forms\Components\TextInput;

class CreateExampleForm extends Form
{
    public function fields(): array
    {
        return [
            Tabs::make('Example Tabs')
                ->tabs([
                    // Your tabs here...
                ]),
            Hidden::make('active_tab'),
        ];
    }
}

?>

Step 2: Create a Custom JavaScript Function to Store the Active Tab’s ID

In your JavaScript code, create a custom function that listens to the `tabpanel:changed` event, which is triggered whenever the active tab changes. This function will update the value of the hidden field with the active tab’s ID:

<script>
    document.addEventListener('DOMContentLoaded', function () {
        const activeTabField = document.querySelector('input[name="active_tab"]');
        const tabPanels = document.querySelectorAll('[data-tab-panel]');

        tabPanels.forEach((tabPanel) => {
            tabPanel.addEventListener('tabpanel:changed', (event) => {
                activeTabField.value = event.detail.panel.id;
            });
        });
    });
</script>

Step 3: Access the Active Tab’s ID in beforeValidation()

Now that we have the active tab’s ID stored in the hidden field, we can access it in the `beforeValidation()` method. Simply retrieve the value of the hidden field and use it to perform your desired operations:

<?php

namespace App\Filament\Resources\ExampleResource\Pages\ExamplePage;

use Filament\Forms\Form;

class CreateExampleForm extends Form
{
    public function beforeValidation(): void
    {
        $activeTab = $this->request->input('active_tab');

        // Perform operations based on the active tab
        if ($activeTab === 'tab-1') {
            // Do something for tab 1
        } elseif ($activeTab === 'tab-2') {
            // Do something for tab 2
        } else {
            // Do something for other tabs
        }
    }
}

?>

Putting it All Together: A Comprehensive Example

Let’s create a comprehensive example to illustrate how to implement this solution. Suppose we have a Filament form with three tabs, each containing a different set of fields:

Tab	Fields
Tab 1	First Name Last Name
Tab 2	Email Phone
Tab 3	Address City

We want to perform different operations based on the active tab in the `beforeValidation()` method. Here’s the complete code:

<?php

namespace App\Filament\Resources\ExampleResource\Pages\ExamplePage;

use Filament\Forms\Components\Hidden;
use Filament\Forms\Components\Tabs;
use Filament\Forms\Components\TextInput;

class CreateExampleForm extends Form
{
    public function fields(): array
    {
        return [
            Tabs::make('Example Tabs')
                ->tabs([
                    Tabs\Tab::make('Tab 1')
                        -> fields([
                            TextInput::make('first_name'),
                            TextInput::make('last_name'),
                        ]),
                    Tabs\Tab::make('Tab 2')
                        -> fields([
                            TextInput::make('email'),
                            TextInput::make('phone'),
                        ]),
                    Tabs\Tab::make('Tab 3')
                        -> fields([
                            TextInput::make('address'),
                            TextInput::make('city'),
                        ]),
                ]),
            Hidden::make('active_tab'),
        ];
    }

    public function beforeValidation(): void
    {
        $activeTab = $this->request->input('active_tab');

        if ($activeTab === 'tab-1') {
            // Do something for tab 1
            $this->form->fields['first_name']->required();
        } elseif ($activeTab === 'tab-2') {
            // Do something for tab 2
            $this->form->fields['email']->required();
        } else {
            // Do something for tab 3
            $this->form->fields['address']->required();
        }
    }
}

?>

In this example, we’ve added a hidden field to store the active tab’s ID and created a custom JavaScript function to update the hidden field’s value whenever the active tab changes. In the `beforeValidation()` method, we retrieve the active tab’s ID and perform different operations based on the active tab.

Conclusion

And there you have it! With this solution, you can now effortlessly retrieve the active tab in Laravel Filament’s `beforeValidation()` method. No more scratching your head or searching for obscure workarounds. By harnessing the power of JavaScript and Filament’s events, you can unlock the full potential of your forms and create a seamless user experience.

Remember, the key to success lies in understanding the underlying mechanics of Filament’s forms and leveraging its built-in features to achieve your desired outcome. With a little creativity and perseverance, you can overcome even the most daunting challenges and create truly remarkable applications.

Happy coding, and don’t forget to share your experiences and insights in the comments below!

Here is the FAQ page about “Laravel Filament: How to get active tab in beforeValidation()” :

Frequently Asked Question

Filament, a popular Laravel admin panel, has many features that make our lives as developers easier. But, sometimes we need to dig deeper to find the solution to a specific problem. Here are some frequently asked questions about getting the active tab in beforeValidation():

I hope this helps!