Pre-fill batch origins from recipe in standalone BatchResource

Selecting a Produkt auto-sets the current Rezeptur and pre-fills one
Herkunft row per Rohstoff. Changing the Rezeptur resets the rows.
Rohstoff is shown read-only (Hidden + Placeholder); user fills in
supplier, origin country, farmer and notes only.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Filament/User/Resources/BatchResource.php

@@ -4,8 +4,10 @@ namespace App\Filament\User\Resources;
 
 use App\Filament\User\Resources\BatchResource\Pages;
 use App\Models\Batch;
+use App\Models\Product;
 use App\Models\ProductSize;
 use App\Models\Recipe;
+use App\Models\Spice;
 use Filament\Forms;
 use Filament\Forms\Form;
 use Filament\Forms\Get;
@@ -41,7 +43,28 @@ class BatchResource extends Resource
                     ->preload()
                     ->required()
                     ->live()
-                    ->afterStateUpdated(fn ($set) => $set('size_id', null)),
+                    ->afterStateUpdated(function ($state, $set) {
+                        $set('size_id', null);
+                        $set('recipe_id', null);
+                        $set('origins', []);
+                        if (! $state) {
+                            return;
+                        }
+                        $product = Product::find($state);
+                        if ($product?->recipes_id) {
+                            $set('recipe_id', $product->recipes_id);
+                            $recipe = Recipe::with('spices')->find($product->recipes_id);
+                            if ($recipe) {
+                                $set('origins', $recipe->spices->map(fn ($s) => [
+                                    'spice_id'       => $s->id,
+                                    'supplier_id'    => null,
+                                    'origin_country' => null,
+                                    'farmer'         => null,
+                                    'notes'          => null,
+                                ])->toArray());
+                            }
+                        }
+                    }),
 
                 Forms\Components\Select::make('size_id')
                     ->label('Variante (Verpackung)')
@@ -55,11 +78,29 @@ class BatchResource extends Resource
 
                 Forms\Components\Select::make('recipe_id')
                     ->label('Rezeptur')
-                    ->relationship('recipe', 'name')
+                    ->options(fn (Get $get) => Recipe::where('product_id', $get('product_id') ?? 0)
-                    ->searchable()
+                        ->orderByDesc('version')
-                    ->preload()
+                        ->get()
+                        ->mapWithKeys(fn ($r) => [$r->id => 'v' . $r->version . ' · ' . $r->created_at->format('d.m.Y')])
+                    )
                     ->required()
-                    ->live(),
+                    ->live()
+                    ->afterStateUpdated(function ($state, $set) {
+                        if (! $state) {
+                            $set('origins', []);
+                            return;
+                        }
+                        $recipe = Recipe::with('spices')->find($state);
+                        if ($recipe) {
+                            $set('origins', $recipe->spices->map(fn ($s) => [
+                                'spice_id'       => $s->id,
+                                'supplier_id'    => null,
+                                'origin_country' => null,
+                                'farmer'         => null,
+                                'notes'          => null,
+                            ])->toArray());
+                        }
+                    }),
 
                 Forms\Components\TextInput::make('units_produced')
                     ->label('Anzahl Einheiten')
@@ -87,17 +128,24 @@ class BatchResource extends Resource
                     ->label('Mindesthaltbarkeitsdatum'),
             ])->columns(2),
 
-            Forms\Components\Section::make('Herkunft der Gewürze')->schema([
+            Forms\Components\Section::make('Herkunft der Rohstoffe')->schema([
                 Forms\Components\Repeater::make('origins')
                     ->label('')
                     ->relationship()
+                    ->afterStateHydrated(function ($component, $record) {
+                        // Pre-fill on create only when no origins exist
+                        if ($record?->id) {
+                            return;
+                        }
+                        // State is set reactively via recipe_id afterStateUpdated
+                    })
                     ->schema([
-                        Forms\Components\Select::make('spice_id')
+                        Forms\Components\Hidden::make('spice_id'),
-                            ->label('Gewürz')
+                        Forms\Components\Placeholder::make('spice_name')
-                            ->relationship('spice', 'name')
+                            ->label('Rohstoff')
-                            ->searchable()
+                            ->content(fn (Get $get): string =>
-                            ->preload()
+                                Spice::find($get('spice_id'))?->name ?? '—'
-                            ->required(),
+                            ),
 
                         Forms\Components\Select::make('supplier_id')
                             ->label('Lieferant')
@@ -115,12 +163,12 @@ class BatchResource extends Resource
                             ->maxLength(255),
 
                         Forms\Components\Textarea::make('notes')
-                            ->label('Infos zum Gewürz')
+                            ->label('Notizen')
                             ->rows(2)
                             ->columnSpanFull(),
                     ])
                     ->columns(2)
-                    ->addActionLabel('Gewürz hinzufügen')
+                    ->addActionLabel('Rohstoff hinzufügen')
                     ->reorderable(false),
             ]),
         ]);