public function up(){
  Schema::table('complains', function (Blueprint $table) {
  $table->integer('user_id')->after('id');
   });
}

<?php

namespace AppHttpControllers;

use IlluminateHttpRequest;
use AppComplain;
use IlluminateSupportFacadesRedirect;
use Session;
use Auth;

class ComplainController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return IlluminateHttpResponse
     */
    public function index()
    {
        //
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return IlluminateHttpResponse
     */
    public function create()
    {
        return view('home');
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  IlluminateHttpRequest  $request
     * @return IlluminateHttpResponse
     */
    public function store(Request $request)
    {
        $this->validate($request, array(

            'title' => 'required|max:255',
            'body' => 'required'

            ));

        $complain = new Complain;

        $complain->user_id = Auth::user()->id;

        $complain->title = $request->title;
        $complain->body = $request->body;

        $complain->save();

        Session::flash('success', 'Your complain was sent to the operator, please wait for feedback.');

        return redirect::back();
    }

    /**
     * Display the specified resource.
     *
     * @param  int  $id
     * @return IlluminateHttpResponse
     */
    public function show($id)
    {
        $complain = Complain::find($id);
        return view('admin')->withPost($complain);
    }

    /**
     * Show the form for editing the specified resource.
     *
     * @param  int  $id
     * @return IlluminateHttpResponse
     */
    public function edit($id)
    {
        //
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  IlluminateHttpRequest  $request
     * @param  int  $id
     * @return IlluminateHttpResponse
     */
    public function update(Request $request, $id)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     *
     * @param  int  $id
     * @return IlluminateHttpResponse
     */
    public function destroy($id)
    {
        //
    }
}

<?php

namespace App;

use IlluminateDatabaseEloquentModel;

class Complain extends Model
{

}