BadMethodCallException in Macroable.php line 81: Method with does not exist. Laravel ORM -

i'm new laravel, using orm trying retrieve data parentcategory table using foreign key present in category table.

following code in category model:

  <?php  namespace app;  use illuminate\database\eloquent\model;  class category extends model {     protected $table='category';      public function parentcategory(){          return $this->belongsto('app\parentcategory','mcategoryid');      }  } 

following parentcategory model code:

<?php  namespace app;  use illuminate\database\eloquent\model;  class parentcategory extends model {     protected $table='maincategory';       public function categories(){          return $this->hasmany('app\category');      }  } 

following code of categorycontroller using retrieve data:

class categorycontroller extends controller {     function index(){          $category=category::all()->with('parentcategory');         $parentcategory=parentcategory::all();         return view('admin.category',['categories'=>$category,'parentcategories'=>$parentcategory]);       }      function add(request $request){          $category= new category();         $category->categoryname=$request["name"];         $category->mcategoryid=$request["parentcategory"];               $category->save();         return redirect()->route('category');      } } 

the error further states: at collection->__call('with', array('parentcategory')) in categorycontroller.php line 17

in index() function, can try

$category = category::with('parentcategory')->get(); 

this should solve problem. follow eager loading documentation.