Assign field value before saving a resource

Justoverclock

In flarum 2 i've created a resource

Endpoint\Create::make()
                ->authenticated()
                ->before(function (OriginalContext $context) {
                    return $this->handleCreate($context);
                }),

i'm trying using this hook to populate a field before is saved, but the result is that now is saved twice, one with my field populated and one not.

how can i do this properly?

so the complete question is: i need to generate a link before all is saved, and i have a function for that, but how should i do this operation?

EDIT

found a solution with the action hook

SychO

If you are trying to set the value of a field that isn't part of the request, then the recommended thing to do would be to use a database resource hook: https://docs.flarum.org/2.x/extend/api#database-resource-hooks

In this case, assuming you want to set a field's value before both creation and update, you could add the following method to your resource:

public function saving(object $model, Context $context): ?object
{
    $model->my_super_cool_field = 'something';

    // if needed you can access other attribute values through
    $attributes = Arr::get($context->body(), 'data.attributes');
    $relationships = Arr::get($context->body(), 'data.relationships');

    return $model;
}

If you are trying to modify the value of an attribute provided in the request, then you can use the set method on the field: https://docs.flarum.org/2.x/extend/api#getter--setter

Justoverclock

that works but what im not understanding is on this part

 public function endpoints(): array
    {
        return [
            Endpoint\Create::make()
                ->authenticated()
                ->action(function (OriginalContext $context) {
                    return $this->saveUserProduct($context);
                }),
            Endpoint\Update::make()
                ->authenticated(),
            Endpoint\Delete::make()
                ->authenticated(),
            Endpoint\Index::make()
                ->paginate()
                ->defaultSort('-createdAt')
                ->limit(30),
        ];
    }

here i also have endpoint for update, delete, and show if i want, but for example i've tried to make a custom route in this file to return the users product (passing user id as param)

Endpoint\Create::make()
                ->authenticated()
                ->action(function (OriginalContext $context) {
                    return $this->saveUserProduct($context);
                }),
 Endpoint\Endpoint::make('get-user-products')
               ->route('GET', '/get-user-products/{id}')
                ->authenticated()
                ->action(function (OriginalContext $context) {
                    return $this->getUserProducts($context);
                }),

but the endpoint not exist, so for sure i cant understand how to use it properly, also for delete and update....they are not working

SychO

Justoverclock

you shouldn't override the action of the create endpoint.

here i also have endpoint for update, delete, and show if i want, but for example i've tried to make a custom route in this file to return the users product (passing user id as param)

You should add a UserIdFilter instead of a new endpoint. (https://docs.flarum.org/2.x/extend/search#adding-a-filter--mutator-for-a-searchable-model)

namespace YourPackage\Search;

use Flarum\Search\Database\AbstractSearcher;
use YourPackage\Model\Product;

class ProductSearcher extends AbstractSearcher
{
    public function getQuery(User $actor): Builder
    {
        return Product::query()->select('products.*');
    }
}

namespace YourPackage\Filter;

use Flarum\Search\Database\DatabaseSearchState;
use Flarum\Search\Filter\FilterInterface;
use Flarum\Search\SearchState;

/**
 * @implements FilterInterface<DatabaseSearchState>
 */
class UserIdFilter implements FilterInterface
{
    public function getFilterKey(): string
    {
        return 'user';
    }

    public function filter(SearchState $state, string $filterValue, bool $negate)
    {
        $userId = trim($filterValue, '"');

        $state->getQuery()->where('products.user_id', $negate ? '!=' : '=', (int) $userId);
    }
}

// extend.php
use Flarum\Extend;
use Flarum\Search\Database\DatabaseSearchDriver;
use Flarum\User\Search\UserSearcher;

return [
  // Other extenders..
  
    (new Extend\SearchDriver(DatabaseSearchDriver::class))
        ->addSearcher(Product::class, ProductSearcher::class)
        ->addFilter(ProductSearcher::class, UserIdFilter::class),
    
  // Other extenders..
];

then you can just do:

app.store.find('products', { filter: { user: 5896 } })

Justoverclock also for delete and update....they are not working

not working how, what errors do you see

Justoverclock

SychO for now i've just used the scope, isn't right?

public function scope(Builder $query, OriginalContext $context): void
    {
        $userId = Arr::get($context->request->getQueryParams(), 'user_id');
        if ($userId) {
            $query->where('user_id', $userId);
        }
    }

i've discovered that the other endpoints works, with the scope i can pass now the userid as query param

SychO

Justoverclock sure, but why not use a filter as demonstrated?

Justoverclock

SychO for sure i will try to implement this method too, the important things is that im able to use all the new flarum 2 features 😛