Nesting repeaters for BelongsToMany relationships about filament

[Khant-Nyar]

that was the same for me if you have a solution for this ,pldas

My Resource

<?php

namespace App\Filament\Resources;

use App\Filament\Enums\AdvantageLayoutTypeEnum;
use App\Filament\Resources\ProductCategoryResource\Pages;
use App\Models\ProductCategory;
use Filament\Forms;
use Filament\Forms\Form;
use Filament\Resources\Concerns\Translatable;
use Filament\Resources\Resource;
use Filament\Tables;
use Filament\Tables\Table;
use Illuminate\Support\Str;

class ProductCategoryResource extends Resource
{
    use Translatable;

    protected static ?string $model = ProductCategory::class;

    protected static ?string $navigationIcon = 'heroicon-o-queue-list';

    protected static ?string $navigationGroup = 'Manage Products';

    public static function form(Form $form): Form
    {
        return $form
            ->schema([
                Forms\Components\TextInput::make('name')
                    ->required()
                    ->maxLength(255)
                    ->live(onBlur: true)
                    ->afterStateUpdated(function (string $operation, $state, Forms\Set $set): void {
                        if ($operation !== 'create') {
                            return;
                        }

                        $set('slug', Str::slug($state));
                    }),

                Forms\Components\TextInput::make('slug')
                    ->disabled()
                    ->dehydrated()
                    ->required()
                    ->maxLength(255)
                    ->unique(ProductCategory::class, 'slug', ignoreRecord: true),
                Forms\Components\FileUpload::make('icon')
                    ->image(),
                Forms\Components\FileUpload::make('image')
                    ->image(),
                Forms\Components\Repeater::make('advantages')
                    ->schema([
                        Forms\Components\TextInput::make('title')
                            ->required(),
                        Forms\Components\Repeater::make('contents')
                            ->schema([
                                Forms\Components\TextInput::make('order')
                                    ->numeric()
                                    ->required(),
                                Forms\Components\TextInput::make('title')
                                    ->required(),
                                Forms\Components\FileUpload::make('img')
                                    ->disk('public')
                                    ->directory('advantages')
                                    ->image(),
                                Forms\Components\MarkdownEditor::make('desc')
                                    ->required(),
                                Forms\Components\Select::make('type')
                                    ->options(AdvantageLayoutTypeEnum::class)
                                    ->required(),
                            ])
                            ->minItems(1)
                            ->collapsible()
                            ->required(),
                    ])
                    ->minItems(1)
                    ->addable(false)
                    ->deletable(false)
                    ->required()
                    ->columnSpanFull(),

            ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('name')
                    ->searchable(),
                Tables\Columns\TextColumn::make('slug')
                    ->searchable()
                    ->toggleable(isToggledHiddenByDefault: true),
                Tables\Columns\ImageColumn::make('icon'),
                Tables\Columns\ImageColumn::make('image'),
                // Tables\Columns\TextColumn::make('advantages.title')
                //     ->searchable(),
                Tables\Columns\TextColumn::make('created_at')
                    ->dateTime()
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
                Tables\Columns\TextColumn::make('updated_at')
                    ->dateTime()
                    ->sortable()
                    ->toggleable(isToggledHiddenByDefault: true),
            ])
            ->filters([
                //
            ])
            ->actions([
                Tables\Actions\EditAction::make(),
            ])
            ->bulkActions([
                Tables\Actions\BulkActionGroup::make([
                    Tables\Actions\DeleteBulkAction::make(),
                ]),
            ]);
    }

    public static function getRelations(): array
    {
        return [
            //
        ];
    }

    public static function getPages(): array
    {
        return [
            'index'  => Pages\ListProductCategories::route('/'),
            'create' => Pages\CreateProductCategory::route('/create'),
            'edit'   => Pages\EditProductCategory::route('/{record}/edit'),
        ];
    }
}

my migration

Schema::create('product_categories', function (Blueprint $table): void {
            $table->id();
            $table->text('name');
            $table->string('slug')->unique();
            $table->string('icon')->nullable()->default(null);
            $table->string('image')->nullable()->default(null);
            $table->json('advantages')->nullable();
            $table->timestamps();
        });

my seeder

$category = ProductCategory::create([
                    'name'       => $categoriesName,
                    'slug'       => Str::slug($categoriesName),
                    'icon'       => 'advantages/01HZE5794C7ADXYKC9HPXHFHS2.png',
                    'image'      => 'advantages/01HZE5794A1KQQYGAQQ9V7Y8B6.png',
                    'advantages' => [
                        [
                            'title'    => 'Advantages of Bio Stimulant',
                            'contents' => [
                                [
                                    'order' => 1,
                                    'title' => 'BioStimulants Assits In Combating The Effects Of Enveromental Stresses',
                                    'img'   => 'advantages/01HZE5794A1KQQYGAQQ9V7Y8B6.png',
                                    'desc'  => fake()->paragraph(),
                                    'type'  => 'right section',
                                ], [
                                    'order' => 2,
                                    'title' => 'Qui aute corporis no',
                                    'img'   => 'advantages/01HZE5794C7ADXYKC9HPXHFHS2.png',
                                    'desc'  => fake()->paragraph(),
                                    'type'  => 'left section',
                                ],
                                [
                                    'order' => 3,
                                    'title' => 'Advantage 1',
                                    'img'   => 'advantage1.png',
                                    'desc'  => fake()->paragraph(),
                                    'type'  => 'right section',
                                ],
                                [
                                    'order' => 4,
                                    'title' => 'Advantage 2',
                                    'img'   => 'advantage2.png',
                                    'desc'  => fake()->paragraph(),
                                    'type'  => 'final section',
                                ],
                            ],
                        ],
                    ],
                ]);

[balu-lt]

Not sure if I’m having the same issue, but here:

app/Models/Guide.php

public function items(): BelongsToMany
{
    return $this->belongsToMany(Item::class);
}

Forms\Components\Repeater::make('steps')
    ->schema([
        Forms\Components\Select::make('item')
            ->relationship(name: 'items', titleAttribute: 'title')
            ->disableOptionsWhenSelectedInSiblingRepeaterItems()
            ->required(),
        Forms\Components\Textarea::make('description')
            ->autosize(),
    ]),

Desired behaviour:
To sync all repeater step items into the guide_item table.

Current behaviour:
It removes all current relations and attaches only the last repeater step item.