Laravel Controller Type Hinting

Question

After creating a model with -mcr (php artisan make:model Institution -mrc), the show function in controller was scaffolded as:

 /**
 * Display the specified resource.
 *
 * @param  \App\Organization\Institution  $institution
 * @return \Illuminate\Http\Response
 */
public function show(Institution $institution)
{
    return view('institutions.show', ['institution' => $institution]);
}

The return view... was inserted by me. I was expecting it to have it populated with the object whose id was sent in the parameters.

/institutions/1

But, after using dd($institution), I verified that it has the ID, not the object.

Shouldn't this variable return me the object?

can you put as your dd output here? – kallosz Aug 08 '18 at 13:54 — kallosz, Aug 08 '18 at 13:54
How is your route defined for show? – pseudoanime Aug 08 '18 at 13:54 — pseudoanime, Aug 08 '18 at 13:54

score 13 · Accepted Answer · edited Aug 08 '18 at 14:08

13

This is called Route Model Binding. Your route will need to look something like:

Route::get('institutions/{institution}', 'InstitutionController@show');

and then as per your controller

public function show(Institution $institution) 
{
    return view('institutions.show', compact($institution))
}

You can read more on this here.

I imagine your route had the parameter called {id} rather than {institution}.

edited Aug 08 '18 at 14:08

Kenny Horna

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answered Aug 08 '18 at 14:01

Munch

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1

The name of the route param, and the name of the param being passed to the controller's method must be the same for this to work. – kaeland Jul 11 '21 at 09:43

score 3 · Answer 2 · answered Aug 08 '18 at 17:21

Replace the parameter of show function

public function show(Institution $institution) 
{
    return view('institutions.show', compact($institution))
}

becomes

public function show($id) 
{
    $institution = App\Institution::findOrFail($id);;
    return view('institutions.show', compact('institution'));
}

and in your routes Route::get('institutions/{id}', 'InstitutionController@show');

Laravel Controller Type Hinting

2 Answers2