加標籤系統錯誤

我用這包加標籤系統錯誤

https://github.com/cviebrock/eloquent-taggable

得到錯誤當我嘗試在我的博客標籤

SQLSTATE [23000]：完整性約束違規：1048列「taggable_id」不能null（SQL：插入到taggable_taggables（created_at,tag_id,taggable_id,taggable_type,updated_at）值（2016-07-05 21:24:20，1，，App \ blog，2016-07-05 21:24:20））

這裏是我的控制器

public function blogstore(Request $request){ 


    $this->validate($request, [ 
     'title' => 'required|max:255|unique:blogs', 
     'summary' => 'required', 
     'description' => 'required', 
     'image' => 'image', 
     'agree' => 'required', 
    ]); 

    $blog = new blog; 
    $blog->title = $request->title; 
    $blog->summary = $request->summary; 
    $blog->content = $request->description; 
    $blog->user_id = Auth::user()->id; 
    $blog->slug = EasySlug::generateSlug($blog->title, $separator = '-'); 
    $blog->tag('Apple,Banana,Cherry'); 
    $blog->tag->taggable_id = 1; 
    if($request->hasFile('image')) { 
     $file = Input::file('image'); 
     //getting timestamp 
     $timestamp = str_replace([' ', ':'], '-', Carbon::now()->toDateTimeString()); 

     $name = $timestamp. '-' .$file->getClientOriginalName(); 

     $blog->image = $name; 

     $file->move(public_path().'/../public_html/img/blog/', $name); 

     $thumb = Image::make(public_path().'/../public_html/img/blog/' . $name)->resize(1366,786)->save(public_path().'/../public_html/img/blog/thumb/' . $name, 90); 
    } 

    $blog->save(); 
    return redirect()->route('admin.blog.index')->with('status', 'Blog Posted Successfully'); 
}

來源

2016-07-05 Sid Heart

我理解它去空，但如何在這裏補充我的博客ID –

注：

insert into `taggable_taggables` 
    (`created_at`  , `tag_id`, `taggable_id`, `taggable_type`, `updated_at`) 
             | 
values         | 
    (2016-07-05 21:24:20, 1  , |   , App\blog  , 2016-07-05 21:24:20)) 
            ^ what's missing here?

來源

2016-07-05 21:35:03

必須blog_id –

我怎麼把我的博客標識在這裏，在這包 –

加標籤系統錯誤

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