Replicate with relations

[Paulsky]

I would like the ability to set the relations which should be replicated on replication. I have checked the replicate() function in Laravel\Nova\Resource, but I don't see any possibility to hook into this function (or in the, later fired, 'replicating' model event).

[wjstraver]

I'm struggling with the same situation. I've been able to do it, but in my opinion quite an ugly hack.

In my model, I've added a public property _replicatedFrom:

app/Models/MyModel.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class MyModel extends Model
{
    public ?int $_replicatedFrom = null;

    //..
}

So I can set the id in the resource replicate function. Note that I also have to add a hidden field for it.

app/Nova/MyModel.php

<?php

namespace App\Nova;

use Laravel\Nova\Fields\Hidden;
use Laravel\Nova\Http\Requests\NovaRequest;

class MyModel extends Resource
{
    public function fields(NovaRequest $request): array
    {
        return [
           //..

           Hidden::('Replicated', '_replicatedFrom')
        ];
    }

    public function replicate(): Resource
    {
        $originalId = $this->model()?->id;

        return tap(parent::replicate(), function(Resource $resource) use ($originalId) {
           $model = $resource->model();
           $model->_replicatedFrom = $originalId;
        });
    }
}

With this, in a ModelObserver on the created event, you can check if this value is set and apply the replications for relationships if you like:

app/Observers/MyModelObserver.php

<?php

namespace App\Observers;

use App\Models\MyModel;

class MyModelObserver
{
    public function created(MyModel $model): void
    {
           if($model->_replicatedFrom) {
                // perform replicating of relations
           }
    }
}

To me this is very ugly, but I haven't found a better solution so far.

[crynobone]

On the latest version you should be able to do the following:

namespace App\Observers;

use App\Models\Post;
use Laravel\Nova\Http\Requests\NovaRequest;
use Laravel\Nova\Nova;

class PostObserver
{
    public function creating(Post $model): void
    {
        Nova::whenServing(function (NovaRequest $request) use ($model) {
            $model->parent_id = $request->input('fromResourceId');
        });
    }
}