Laravel 5 尝试更新时未找到laravel pivot表列

问题是，当我尝试更新

图书

表时，它显示错误

未知列“publisher”

我有一个

book\u出版商

pivot表

我必须写什么代码？我必须在哪里写

class Book extends Model
{


  //  protected table='book';
    public function authors()
    {
      return $this->belongsToMany(Author::class)->withPivot('type');
    }

    // public function author($type)
    // {
    //
    //   return $this->authors()->where('type', $type)->first();
    // }
    public function author()
    {

      return $this->authors()->where('type', 'Author')->first();


    }
    public function illustrator()
    {

      return $this->authors()->where('type', 'Illustrator')->first();
    }
    public function translator()
    {

      return $this->authors()->where('type', 'Translator')->first();
    }
    public function editor()
    {

      return $this->authors()->where('type', 'Editor')->first();
    }


    // foreach ($book->authors as $author)
    // {
    //     $author->type;
    // }

    public function publishers()
    {
      return $this->belongsToMany(Publisher::class);
    }
}

图书管理员

public function edit($id)
    {
      $book=Book::findOrFail($id);
      $category=Category::pluck('name', 'id');
      $publishers=Publisher::all();
      foreach($publishers as $publisher)
      {
        $publisher->id=$publisher->name;
      }
      return view('books.edit', compact('book','category','publishers'));
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Http\Response
     */
    public function update(Request $request, $id)
    {

      $book=Book::findOrFail($id);
      $book->Update($request->all());
      Book::find($id)->publisher()->updateExistingPivot($request->only('publisher_id'));
      return redirect('books');
    }

还请告诉我是否需要编辑edit.blade.php。

检查这些方法

$books = Book::find($id);
$books->publisher()->updateExistingPivot('publisher_id',
['publisher_id' => publisher_id],false));

或者类似的事情

$books = Book::find($id);
$publisher = $books->publisher;
$publisher->pivot->publisher_id = $request->publisher_id;
$publisher->pivot->save();

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您的问题不清楚，并且缺少任何代码来解释您的问题。