error when updating table (crud) in laravel - html

Question

When I get ready to edit the table I get the following error:
"The POST method is not supported for this route. Supported methods:
GET, HEAD."
<?php
Route::get('/crear',[
'uses'=>'CarController#mostrar',
'as'=>'cars.create'
]
);
Route::post('/crear',[
'uses'=>'CarController#crear',
'as'=>'cars.crear'
]);
Route::get('/', 'CarController#casa' );
Route::post('cars/{id?}/editar', 'CarController#edit')->name('editarcar');
Route::post('cars/{id?}/editar', 'CarController#update');
Auth::routes();
Route::get('/home', 'HomeController#index')->name('home');
Route::resource('cars', 'CarController');
In View
#extends('layouts.app')
#section('title', 'Contact')
#section('content')
<div class="container col-md-8 col-md-offset-2">
<div class="well well bs-component">
<form class="form-horizontal" method="post">
#foreach ($errors->all() as $error)
<div class="alert alert-danger">{{ $error }}</div>
#endforeach
#if(session('status'))
<div class="alert alert-success">
{{ session('status') }}
</div>
#endif
{!! csrf_field() !!}
<fieldset>
<legend>Editar </legend>
<div class="form-group">
<label for="patente" class="col-lg-label">patente</label>
<div class="col-lg-10">
<input type="text" name="patente"size="6" maxlength="6" class="form-control"required>
</div>
</div>
<div class="form-group">
<label for="marca" class="col-lg-label">marca</label>
<div class="col-lg-10">
<input type="text" name="marca" class="form-control" required>
</div>
</div>
<div class="form-group">
<label for="modelo" class="col-lg-label">modelo</label>
<div class="col-lg-10">
<input type="text" name="modelo" class="form-control" required>
</div>
</div>
<div class="form-group">
<label for="color" class="col-lg-label">color</label>
<div class="col-lg-10">
<input type="text" name="color" class="form-control" required>
</div>
</div>
<div class="form-group">
<div class="col-lg-10 col-lg-offset-2">
<button class="btn btn-default">Cancelar</button>
<button type="submit" class="ntm btn-primary">Actualizar</button>
</div>
</div>
</fieldset>
</form>
</div>
</div>
#endsection
Controller
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
namespace App\Http\Controllers;
use App\Car;
use Illuminate\Http\Request;
public function edit($id)
{
$car = car::whereid($id)->firstOrFail();
return view('edit', compact('cars'));
}
public function update(Request $request, $id)
{
$car = car::whereid($id)->firstOrFail();
$car->patente = $request->post('patente');
$car->marca = $request->post('marca');
$car->modelo = $request->post('modelo');
$car->color = $request->post('color');
$car->save();
return redirect(action('CarsController#edit', $car->id))->with('status', 'El car ' . $id . ' ha sido actualizado');
}

Answer 1

Update your controller > edit action with correct variable compact.
public function edit($id)
{
$car = car::whereid($id)->firstOrFail();
return view('edit', compact('car'));
}
Add a form action like {{ route("cars.update", ['car' => $car->id]) }} so your view looks like:
#extends('layouts.app')
#section('title', 'Contact')
#section('content')
<div class="container col-md-8 col-md-offset-2">
<div class="well well bs-component">
<form class="form-horizontal" action="{{ route("cars.update") }}" method="post">
#foreach ($errors->all() as $error)
<div class="alert alert-danger">{{ $error }}</div>
#endforeach
#if(session('status'))
<div class="alert alert-success">
{{ session('status') }}
</div>
#endif
{!! csrf_field() !!}
<fieldset>
<legend>Editar </legend>
<div class="form-group">
<label for="patente" class="col-lg-label">patente</label>
<div class="col-lg-10">
<input type="text" name="patente"size="6" maxlength="6" class="form-control"required>
</div>
</div>
<div class="form-group">
<label for="marca" class="col-lg-label">marca</label>
<div class="col-lg-10">
<input type="text" name="marca" class="form-control" required>
</div>
</div>
<div class="form-group">
<label for="modelo" class="col-lg-label">modelo</label>
<div class="col-lg-10">
<input type="text" name="modelo" class="form-control" required>
</div>
</div>
<div class="form-group">
<label for="color" class="col-lg-label">color</label>
<div class="col-lg-10">
<input type="text" name="color" class="form-control" required>
</div>
</div>
<div class="form-group">
<div class="col-lg-10 col-lg-offset-2">
<button class="btn btn-default">Cancelar</button>
<button type="submit" class="ntm btn-primary">Actualizar</button>
</div>
</div>
</fieldset>
</form>
</div>
</div>
#endsection