php - error in model laravel 5.3 -


i'm doing update blog data data has been updated except flag print data of request

but data of flag is'nt updated

here code 

 public function update(request $request, $id)  {     $data=$request->all();     //dd($request->flag);     $data       =   $request->except(['_token']);     $blog=blog::findorfail($id);     $blog->update($data);     // $blog->update($request->flag);     dd($data);         if(request()->hasfile('url_image'))         {                     $file=$request['url_image'];                     $name =md5(uniqid(rand(), true)). $file->getclientoriginalname();                     $request->file('url_image')->move('dezique/images/blog/', $name);                     $blog->url_image=('dezique/images/blog/'.$name);                      $blog->update();         }         else         {                     $blog->url_image=('dezique/images/blog/cafe.jpeg');                     $blog->update();         }   }

ths model 

<?php  namespace app;  use illuminate\database\eloquent\model;  class blog extends model {     protected $table="blogs";      public function author()     {         return $this->belongsto('app\author');     }      protected $fillable = [             'name',             'url_image',             'description',             'blog_category_id',             'author_id',             'flag => string',             'created_at',             'updated_at',             ]; }

when put flag on $fillable , put in controller $blog->update($request->flag); got error enter image description here

update method require array parameter. can use $blog->save() update image

and on $fillable change 'flag => string' flag


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