在Laravel 5.2中提交表单时，MethodNotAllowedHttpException

I need update some record and this is form action in my blade

<form class="form-vertical" role="form" method="post" action="/projects/{{ $project->id }}/collaborators/{{ $collaborator->user()->first()->id }}">

controller

public function update(Request $request, $projectId, $collaboratorId)
 {
    $this->validate($request, [
            'status'  => 'required',
        ]);

        DB::table('permissions')
            ->where('project_id', $projectId)
            ->where('collaborator_id', $collaboratorId)
            ->update(['status' => $request->input('status')]);

        return redirect()->back()->with('info','Your Permission has been updated successfully');



 }

routes

Route::put('projects/{projects}/collaborators/{id}',['uses'=>'ProjectCollaboratorsController@update',]);

when click update button generate following error

MethodNotAllowedHttpException in RouteCollection.php line 218:

how can solve this

As @Tiger mentioned in comment,

In your route you have defined put method and your form is using post method you should have to add hidden input in your form.

Add <input type="hidden" name="_method" value="PUT"> after your opening form tag. Like below:

<form class="form-vertical" role="form" method="post" action="/projects/{{ $project->id }}/collaborators/{{ $collaborator->user()->first()->id }}"

<input type="hidden" name="_method" value="PUT">