/**
  * Update the specified department in storage.
  */
 public function update($id)
 {
     $department = Department::findOrFail($id);
     $validator = Validator::make($input = Input::all(), Department::rules($id));
     if ($validator->fails()) {
         return Redirect::back()->withErrors($validator)->withInput();
     }
     $department->update(['deptName' => $input['deptName']]);
     foreach ($input['designation'] as $index => $value) {
         if ($value == '' && !isset($input['designationID'][$index])) {
             continue;
         }
         if (isset($input['designationID'][$index])) {
             if ($value == '') {
                 Designation::destroy($input['designationID'][$index]);
             } else {
                 $design = Designation::find($input['designationID'][$index]);
                 $design->designation = $value;
                 $design->save();
             }
         } else {
             Designation::firstOrCreate(['deptID' => $department->id, 'designation' => $value]);
         }
     }
     return Redirect::route('admin.departments.index')->with('success', "<strong>{$input['deptName']}</strong>  Actualizado correctamente");
 }