BelongsTo Field with Dependency

This package is based on the original Orlyapps package, which we do not know if is still under maintenance.

Installation

You can install the package in to a Laravel app that uses Nova via composer:

composer require emilianotisato/nova-belongsto-depends

Use this field in your Nova Resource

// Add the use statement a the top of your nova resource
use EmilianoTisato\NovaBelongsToDepends\NovaBelongsToDepends;

// ...

public function fields(Request $request)
{
    return [
        ID::make()->sortable(),
        Text::make('Name')->rules('required', 'max:255'),

        NovaBelongsToDepends::make('Company')
            ->options(\App\Company::all()),
        NovaBelongsToDepends::make('Department')
            ->optionsResolve(function ($company) {
                // Reduce the amount of unnecessary data sent
                return $company->departments()->get(['id','name']);
            })
            ->dependsOn('Company'),
        NovaBelongsToDepends::make('Location')
            ->optionsResolve(function ($company) {
                // Reduce the amount of unnecessary data sent
                return $company->locations()->get(['id','name']);
            })
            ->dependsOn('Company'),

    ];
}

Sample

• Warehouse hasMany Articles
• Articles belongsToMany Suppliers
• Suppliers belongsToMany Articles

1. Select a Warehouse and get all articles of the warehouse
2. Select a Article and get all suppliers who has this article

public function fields(Request $request)
{
    return [
        ID::make()->sortable(),
        Text::make('Name')->rules('required', 'max:255'),

        NovaBelongsToDepends::make('Warehouse')
        ->options(\App\Warehouse::all())
        ->rules('required'),
        NovaBelongsToDepends::make('Article')
            ->optionsResolve(function ($warehouse) {
                return $warehouse->articles;
            })
            ->dependsOn('Warehouse')
            ->rules('required'),
        NovaBelongsToDepends::make('Supplier')
            ->optionsResolve(function ($article) {
                return \App\Supplier::whereHas('articles', function ($q) use ($article) {
                    $q->where('article_id', $article->id);
                })->get();
            })
            ->dependsOn('Article')
            ->rules('required'),


    ];
}

Use multiple instances

Some times you need to use multiple instances o mabye you have a second resource for the same eloquent model (example: App\Nova\User and App\Nova\Provider both represent App\User model). In those cases to avoid conflict you can delcare the specific Nova resources in meta attributes (->withMeta(['calledFromClass' => 'App\Nova\Provider'])) like this:

            NovaBelongsToDepends::make('Client')
                ->options(\App\Client::all()),

            NovaBelongsToDepends::make('Provider')
                ->withMeta(['calledFromClass' => 'App\Nova\Provider'])
                ->optionsResolve(function ($client) {
                    return $client->providers()->active()->get(['id', 'name']);
                })->dependsOn('Client')
                ->rules('required'),

Credits

• Creator: Orlyapps
• Mantainers: Emiliano Tisato

License

The MIT License (MIT). Please see License File for more information.