php - Unresolvable dependency resolving in Laravel Repository -

i'm having "unresolvable dependency resolving [parameter #1 [ $mainpage ]]" error after trying manage dependency injection in repository. i've managed build controller, repository, interface , service provider. missing here? i'm doing wrong in logic?

home controller

use repositories\mainpagerepository;  class homecontroller extends basecontroller {  protected $cpage, $mainpage;  public function __construct(mainpagerepository $cpage, $mainpage) {     $this->cpage = $cpage;     $this->mainpage = $mainpage; }  public function getpages($lang, $slug) {      $cpage = $this->cpage->getcurrentpage($lang, $slug);      $mainpages = $this->mainpage->getallmainpages($cpage);      $allpages = $this->getallpages($mainpages);      return view::make('index')     ->with('cpage', $cpage)     ->with('mainpages', $mainpages)     ->with('allpages', $allpages); }  private function getallpages($pages)  {     $allpages = array();      foreach ($pages $page) {            //...      }     return $allpages; } 

mainpageinterface

namespace repositories;  interface mainpageinterface {    public function getcurrentpage($lang, $slug);    public function getallmainpages($cpage); } 

mainpagerepository

namespace repositories;  use page;  class mainpagerepository implements mainpageinterface{    public function getcurrentpage($lang, $slug)   {     $cpage = page::join('langs', 'langs.id', '=', 'pages.lang_parent_id')                 ->where('slug', '=', $slug)                 ->where('code', '=', $lang)                 ->first();      return $cpage;   }    public function getallmainpages($cpage)   {     $mainpage = page::join('langs', 'langs.id', '=', 'pages.lang_parent_id')             ->where('parent_id', null)             ->get();      return $mainpage;   }  } 

mainpageserviceprovider

namespace repositories;  use illuminate\support\serviceprovider;  class mainpageserviceprovider extends serviceprovider {    public function register()   {     $this->app->bind('mainpageinterface', 'mainpagerepository');   } } 

implemented changes after @matt burrows answer: problem still persists controller

use repositories\mainpageinterface;  class homecontroller extends basecontroller {  protected $cpage, $mainpage;  public function __construct(mainpageinterface $cpage, $mainpage) {     $this->cpage = $cpage;     $this->mainpage = $mainpage; } 

service provider

public function register() {     $this->app->bind('repositories\mainpageinterface', 'repositories\mainpagerepository'); } 

---

ok, managed on splitting 2 functions in repository 2 seperate repositories. did trick. i'll accept @matts answer correct in case, since spotted important mistakes nonetheless.

change

$this->app->bind('mainpageinterface', 'mainpagerepository'); 

to

$this->app->bind('repositories\mainpageinterface', 'repositories\mainpagerepository'); 

within service provider.

also change

use repositories\mainpagerepository; 

to

use repositories\mainpageinterface; 

and change

public function __construct(mainpagerepository $cpage, $mainpage) 

to

public function __construct(mainpageinterface $cpage, $mainpage) 

and should work.

remember register service provider within app.php if have not done already.

this can done adding class path array of providers so;

'providers' => array(     //...     'repositories\mainpageserviceprovider' )     

be sure composer dump-autoload too

for problem of unresolvable dependency resolving [parameter #1 [ $mainpage ]] because ioc container not know type of object $mainpage is. type cast object , want.

this can done so;

use path\to\a\object;  ...  __construct(mainpagerepository $cpage, object $mainpage)