Laravel - Problemas con la conculta a la BD

public function edit($id)

{

    $estudiante = DB::table('students')

       ->join('peoples', 'students.people_id', '=', 'peoples.id')

        ->where('students.id', $id)

        ->first(); //recupera un objeto

        return view('app.student.edit',[

            'editStudent'=>$estudiante

        ]);/**/

}

@extends('app.layouts.app')

@section('title', 'Editar Estudiante')

@section('content')

	<div class="col-lg-10 col-lg-offset-1">

		<h2>FORMULARIO DE EDICIÓN DE ESTUDIANTE</h2>

		{{ Form::open(['route'=>['estudiante.update', $editStudent->id],'method' => 'patch', 'role' => 'form']) }}

			<!-- Y AQUI PROCEDEMOS A CREAR LOS ELEMENTOS DE NUESTRO FORMULARIO-->

		<div class="col-lg-6">

			<div>

				{{ Form::label('rude', 'RUDE') }}

				{{ Form::text('rude', $editStudent->rude, ['class' => 'form-control','required'=>'true','minlength'=>'3'])}}

			</div>

			<div>

				{{ Form::label('name', 'NOMBRE') }}

				{{ Form::text('name',$editStudent->name, ['class' => 'form-control','required'=>'true','minlength'=>'3']) }}

			</div>

		</div>

		<div class="col-lg-6">

			<div>

				{{ Form::label('firstname', 'APELLIDO PATERNO') }}

				{{ Form::text('firstname',$editStudent->firstname, ['class' => 'form-control','required'=>'true','minlength'=>'3']) }}

			</div>

			<div>

				{{ Form::label('lastname', 'APELLIDO MATERNO') }}

				{{ Form::text('lastname',$editStudent->lastname, ['class' => 'form-control','required'=>'true','minlength'=>'3']) }}

			</div>

		</div>

<br>

		<div class="col-lg-12">

			<div class="form-group">

				<a href="{{ route('estudiante.index')}}" class="btn btn-danger"> CANCELAR </a>

				<button type="submit" class="btn btn-success"> GUARDAR</button>

			</div>

		</div>

		{{ Form::close() }}

	</div>

@endsection