### Install filament-async-column via Composer

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Install the package via Composer. Requires PHP 8.2+ and filament/tables ^5.0. No build step or npm needed for panel users.

```bash
composer require giacomomasseron/filament-async-column
```

--------------------------------

### Add AsyncColumn with resolveUsing()

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Shows the minimal setup for AsyncColumn: add the column and provide a resolveUsing() callback. This is the only method every AsyncColumn needs.

```php
use GiacomoMasseroni\AsyncColumn\Columns\AsyncColumn;
use Filament\Tables\Table;
use Illuminate\Support\Facades\Http;

public function table(Table $table): Table
{
    return $table->columns([
        AsyncColumn::make('open_support_tickets')
            ->resolveUsing(fn ($record) => Http::get('https://support.example.com/api/tickets/count', [
                'customer_id' => $record->id,
            ])->json('count')),
    ]);
}
```

--------------------------------

### Publish Filament assets outside a panel

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Run this command after installing the package and after every composer update when using filament/tables outside a panel. It copies the package's assets to public/ so @filamentStyles and @filamentScripts can serve them.

```bash
php artisan filament:assets
```

--------------------------------

### Publish the filament-async-column config file

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Publishes the package's configuration file to the application's config directory. Run this command to customize the default settings.

```bash
php artisan vendor:publish --tag="filament-async-column-config"
```

--------------------------------

### Format AsyncColumn with money(), weight(), and color()

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Demonstrates that AsyncColumn extends TextColumn, so formatting methods like money(), weight(), and color() work on the resolved value.

```php
AsyncColumn::make('lifetime_value')
    ->resolveUsing(fn ($record) => $this->billingService->lifetimeValue($record))
    ->money('USD')
    ->weight('bold')
    ->color(fn (?float $state) => $state > 1000 ? 'success' : 'gray');
```

--------------------------------

### Run tests with composer test

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Runs the project's test suite using Composer. Use this command to execute all tests defined in the project.

```bash
composer test
```

--------------------------------

### Configure async-column cache and batch size

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Default configuration for the package. The cache_store uses the application's default store when null, cache_prefix is used for all cache keys, and max_batch_size caps the number of cell tokens per batch request, falling back to 200 for values <= 0.

```php
// config/async-column.php

return [
    // Cache store used by ->cacheFor(). Null = the application's default store.
    'cache_store' => env('ASYNC_COLUMN_CACHE_STORE'),

    // Prefix for every cache key this package writes.
    'cache_prefix' => 'async-column',

    // Maximum number of cell tokens resolved in a single batch request. Extra
    // tokens beyond this cap are silently truncated, never an error. A value
    // <= 0 (including a malformed env value) falls back to the default of
    // 200 rather than disabling the cap.
    'max_batch_size' => (int) env('ASYNC_COLUMN_MAX_BATCH_SIZE', 200),
];
```

--------------------------------

### Customize loading and error states

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Customize the loading and error states. Both loadingState() and errorState() accept a string, an Htmlable, or a closure. Defaults are a CSS skeleton and a translated 'Could not load'.

```php
AsyncColumn::make('shipment_eta')
    ->resolveUsing(fn ($record) => $this->carrier->eta($record))
    ->loadingState('Checking carrier...')
    ->errorState('Carrier unavailable');
```

--------------------------------

### Render AsyncColumn as raw HTML with ->html()

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Renders the resolved value as raw HTML using ->html(). Use when the resolver returns markup you trust.

```php
AsyncColumn::make('status_badge')
    ->resolveUsing(fn ($record) => '<span class="badge">'.$record->status.'</span>')
    ->html();
```

--------------------------------

### Scope cache per viewer with cacheVersion

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Use when the resolver returns viewer-specific data. The cache key is shared across users, so scope it per viewer by setting a cache version based on the authenticated user's ID.

```php
AsyncColumn::make('my_price')
    ->cacheFor(300)
    ->cacheVersion(fn () => auth()->id())
```

--------------------------------

### Render AsyncColumn with a custom view

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Renders the resolved value using a custom view via ->view(). The resolved state and record are available in the view.

```php
AsyncColumn::make('status')
    ->resolveUsing(fn ($record) => $record->status)
    ->view('columns.status-pill');
```

--------------------------------

### Sort an AsyncColumn with a custom query closure

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Use this when the underlying data is sortable through a custom query. The `sortable()` method throws unless a `query:` closure is provided, because the resolver produces the value after the table's query has already run. The closure must order by a column that exists in SQL, such as a `withCount()` aggregate.

```php
AsyncColumn::make('open_support_tickets')
    ->resolveUsing(fn ($record) => $this->ticketService->count($record))
    ->sortable(query: fn (Builder $query, string $direction) => $query
        ->withCount('supportTickets')
        ->orderBy('support_tickets_count', $direction))
```

--------------------------------

### Cache expensive resolution with cacheFor()

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Cache the resolved value for a number of seconds with cacheFor(). Read the Caching section first: keys are shared across users, which is suitable for record-specific data but problematic for viewer-specific data.

```php
AsyncColumn::make('open_support_tickets')
    ->resolveUsing(fn ($record) => $this->tickets->count($record))
    ->cacheFor(300); // seconds
```

--------------------------------

### Render AsyncColumn as plain text

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Renders the resolved value as plain text (the default). The value is cast to a string and HTML-escaped.

```php
AsyncColumn::make('status')->resolveUsing(fn ($record) => $record->status);
```

--------------------------------

### Handle exceptions with errorStateUsing()

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Use errorStateUsing() to access the underlying Throwable. The closure parameter must be named $exception for Filament to inject it. Never render $exception->getMessage() directly into the cell due to security risks.

```php
->errorStateUsing(fn (Throwable $exception) => $exception instanceof ConnectionException
    ? 'Carrier offline'
    : 'Could not load')
```

--------------------------------

### Disable click-to-retry with retryable(false)

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Disable click-to-retry for failed cells by passing false to retryable(). Use when the resolver is not safe to repeat or costs money per call.

```php
AsyncColumn::make('credit_check')
    ->resolveUsing(fn ($record) => $this->bureau->check($record))
    ->retryable(false);
```

--------------------------------

### Wait for cell visibility with whenVisible()

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Use whenVisible() to delay resolution until the cell scrolls into the viewport, using IntersectionObserver. By default, visible cells resolve as soon as the page paints.

```php
AsyncColumn::make('inventory_level')
    ->resolveUsing(fn ($record) => $this->warehouse->stockFor($record))
    ->whenVisible();
```

--------------------------------

### Clear cache in a model observer

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Typical usage in a model observer to clear the cached cell the moment the underlying data changes. The same call works in queued jobs or tinker.

```php
class PostObserver
{
    public function saved(Post $post): void
    {
        AsyncColumn::forget(ListPosts::class, 'stock_level', $post->getKey());
    }
}
```

--------------------------------

### Invalidate cached cells with AsyncColumn::forget()

Source: https://github.com/giacomomasseron/filament-async-column/blob/main/README.md

Removes cached cells written by cacheFor(). Takes the key's parts rather than a column instance, so it can be called from anywhere. The record key must match the table's getTableRecordKey() and the version must match exactly; a Closure version cannot be forgotten and throws a LogicException.

```php
use GiacomoMasseroni\AsyncColumn\Columns\AsyncColumn;

// One cell.
AsyncColumn::forget(ListPosts::class, 'stock_level', $post->getKey());

// Many cells of the same column, in one call.
AsyncColumn::forget(ListPosts::class, 'stock_level', [1, 2, 3]);

// A cell written under a ->cacheVersion().
AsyncColumn::forget(ListPosts::class, 'stock_level', $post->getKey(), version: 'v2');
```

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