BelongsToThrough::associate()

[vmihaly2020]

"staudenmeir/belongs-to-through": "2.9", PHP 7.2.26 Laravel Framework 6.18.19 I get this error on update: Call to undefined method Znck\Eloquent\Relations\BelongsToThrough::associate() and this is my relation methode:

 public function language() {
        return $this->belongsToThrough(\ModulMap::model('Language'), [\ModulMap::model('FaqCategory')], null,'', [\ModulMap::model('FaqCategory') => 'category_id'] );
 }

[staudenmeir]

I get this error on update:

What update? This method doesn't exist.

[vmihaly2020]

On update form of FaqTopicModel

use Illuminate\Database\Eloquent\Model;
class FaqTopic extends Model{
 public function language() {
        return $this->belongsToThrough(\ModulMap::model('Language'), [\ModulMap::model('FaqCategory')], null,'', [\ModulMap::model('FaqCategory') => 'category_id'] );
 }
}

[staudenmeir]

How are you using the relationship?

[vmihaly2020]

I use this with Laravel Nova. The updateting process is controlled by \Laravel\Nova\Resource. I don't know why is called that method. After I have added the ``

public function associate(){ }

into the Znck\Eloquent\Relations\BelongsToThrough it started to work, but I don't think this is the right solution for this issue.

this is the stacktrace

C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Support\Traits\ForwardsCalls.php:36
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\Relation.php:385
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\Fields\BelongsTo.php:253
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\Fields\Field.php:341
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\Fields\Field.php:320
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\Fields\BelongsTo.php:221
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Support\HigherOrderCollectionProxy.php:60
:
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Support\Collection.php:638
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Support\HigherOrderCollectionProxy.php:61
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\FillsFields.php:67
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\FillsFields.php:35
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\Http\Controllers\ResourceUpdateController.php:32
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Database\Concerns\ManagesTransactions.php:29
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Database\DatabaseManager.php:349
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Support\Facades\Facade.php:261
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\Http\Controllers\ResourceUpdateController.php:41
:
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Routing\Controller.php:54
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Routing\ControllerDispatcher.php:45
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Routing\Route.php:219
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Routing\Route.php:176
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Routing\Router.php:681
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:130
C:\projs\vrsrc\lcrm.loc\app\Http\Middleware\PasswordExpired.php:29
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\Http\Middleware\Authorize.php:18
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\Http\Middleware\BootTools.php:20
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\Http\Middleware\DispatchServingNovaEvent.php:20
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Auth\Middleware\Authenticate.php:43
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\Http\Middleware\Authenticate.php:31
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Routing\Middleware\SubstituteBindings.php:41
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\VerifyCsrfToken.php:76
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\View\Middleware\ShareErrorsFromSession.php:49
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Session\Middleware\StartSession.php:56
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse.php:37
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Cookie\Middleware\EncryptCookies.php:66
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:105
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Routing\Router.php:683
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Routing\Router.php:658
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Routing\Router.php:624
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Routing\Router.php:613
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php:170
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:130
C:\projs\vrsrc\lcrm.loc\vendor\laravel\nova\src\Http\Middleware\ServeNova.php:26
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\TransformsRequest.php:21
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\TransformsRequest.php:21
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\ValidatePostSize.php:27
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode.php:63
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\fideloper\proxy\src\TrustProxies.php:57
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:171
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Pipeline\Pipeline.php:105
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php:145
C:\projs\vrsrc\lcrm.loc\vendor\laravel\framework\src\Illuminate\Foundation\Http\Kernel.php:110
C:\projs\vrsrc\lcrm.loc\public\index.php:55

[staudenmeir]

@dennislindsey Can you maybe take a look at this? Did you ever run into the same issue?

[staudenmeir]

I'm afraid I won't be able to help you with this.

It sounds like something that the package can't support. It wouldn't be possible to set the foreign key on the parent model (FaqTopic) from the related model (Language) because it can only be retrieved from the intermediate model (FaqCategory).

[dennislindsey]

I've also not run into this issue before - but I think the core problem is that you'd need to create an instance of the intermediate model for the BelongsToThrough relationship to work. The whole point of using this tool is that the intermediate resource isn't just a pivot table and is its own entity. I'd recommend, within Nova, defining the relationship of the intermediate model to be edited from either the parent or child model; and setting the relationship from parent<->child to be read-only in the interface.

[mrkaaf]

I have same issue when use this with Nova admin panel.