Failed Laravel dependency injection in controller method

Question

I have a model called Dbtable which isn't injected when used like this:

public function showEditDbTableForm(Request $request, DbTable $table) 
{

}

it only works when I do this:

public function showEditDbTableForm(Request $request, $id)
{
    $table = DbTable::find( $id );
}

Same thing happens even when I rename DbTable to DbTble

P.S.: please don't be rude with me as I'm new to Laravel framework

what do you mean by "it isn't injected", is there an error? But if you are talking about 'route model binding' the route parameter name has to match the method parameter name — lagbox
– lagbox, Commented Jun 2, 2018 at 18:56
The second parameter of the showEditDbTableForm is the id for a DbTable record. So, when using DbTable $table I expect the model to be retrieve automatically — Stephane
– Stephane, Commented Jun 2, 2018 at 19:00
reread the 'route model binding' documentation, the route parameter name must match the method parameter name (for implicit binding), might be some other goodies in there too :) but guessing since i can't see a route definition — lagbox
– lagbox, Commented Jun 2, 2018 at 19:01

Pradeep · Accepted Answer · 2018-06-03 03:15:45Z

2

For Implicit Route Model Binding you need to make sure the parameter in the method signature has the same name as the route parameter you want to bind.

Route::get('widgets/{widget}', 'WidgetsController@show');

public function show(Widget $widget)

Laravel automatically resolves Eloquent models defined in routes or controller actions whose type-hinted variable names match a route segment name.

Laravel 5.6 Docs - Routing - Implicit Model Binding

edited Jun 3, 2018 at 3:15

Pradeep

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answered Jun 2, 2018 at 19:09

lagbox

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Pradeep · Accepted Answer · 2018-06-03 03:16:10Z

1

In RouteServiceProvider class add

public function boot()
{
    parent::boot();

    Route::model('db-table', App\DbTable::class);
    // db-table correspond your rout parameter
}

see official documentation https://laravel.com/docs/5.5/routing Explicit Binding section

edited Jun 3, 2018 at 3:16

Pradeep

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answered Jun 2, 2018 at 19:07

Davit Zeynalyan

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