Laravel - ErrorException未定义索引:firstname

时间:2017-09-17 12:14:52

标签: php laravel crud

首先,我是Laravel的新手,我正试图通过添加,修改,删除作者和书籍来制作crud操作示例。所以我的作者crud工作正常,但当我尝试通过获取创建一本书创建的作者我收到此错误:

ErrorException (E_NOTICE)
"Undefined index: firstname"

所以继承我的代码: 我的作者.php

class Authors extends Model
{
    protected $table ='authors';
    protected $fillable = ['firstname','lastname'];

    public function book()
    {
        return $this->hasMany('Books','author');
    }
}

my Books.php:

class Books extends Model
{
    protected $table = 'books';
    protected $fillable = ['title'];
    public function author()
    {
        return $this->belongsTo('App\Authors');
    }
}

我的BooksController.php(它实际上得到了异常):

 public function create()
    {
        return view('books.index');
    }

    public function store(Request $request)
    {

        $inputs = $request->all();

        $book = new Books();
        $book->title = $inputs['title'];

        $book->author()->attach($inputs['firstname']);
        $book->author()->attach($inputs['lastname']);

        $book->save();
        return redirect('/books');
    }

我的index.php:

@section('content')

    <div class="container">
        <form method="post" action="{{url('books')}}">
            <div class="form-group row">
                {{csrf_field()}}
                <label for="lgFormGroupInput" class="col-sm-2 col-form-label col-form-label-lg">Title</label>
                <div class="col-sm-10">
                    <input type="text" class="form-control form-control-lg" id="lgFormGroupInput" placeholder="title" name="title">
                </div>
            </div>
            <div class="form-group row">
                {{csrf_field()}}
                <label for="lgFormGroupInput" class="col-sm-2 col-form-label col-form-label-lg">Author</label>
                <div class="col-sm-10">
                    <select id="author" name="author">
                        <option value="Z">Select an author</option>
                        @foreach ($authors as $author)
                        <option value="{{$author['id']}}">{{$author['firstname']}} {{$author['lastname']}}</option>
                        @endforeach
                    </select>
                </div>
            </div>
                    <input type="submit" value="Create" />
        </form>
    </div>

    <div class="container">
        <table class="table table-striped">
            <thead>
            <tr>
                <th>ID</th>
                <th>Title</th>
                <th>Author</th>
            </tr>
            </thead>
            <tbody>
            @foreach($books as $book)
                <tr>
                    <td>{{$book['id']}}</td>
                    <td>{{$book->$author['firstname']}} {{$book->$author['lastname']}}</td>
                    <td><a href="{{action('BooksController@edit', $book['id'])}}" class="btn btn-warning">Edit</a></td>
                    <td>
                        <form action="{{action('BooksController@destroy', $book['id'])}}" method="post">
                            {{csrf_field()}}
                            <input name="_method" type="hidden" value="DELETE">
                            <button class="btn btn-danger" type="submit">Delete</button>
                        </form>
                    </td>
                </tr>
            @endforeach
            </tbody>
        </table>
    </div>
 @endsection

所以,我不知道为什么我在控制器的商店里得到这个例外......提前谢谢!

2 个答案:

答案 0 :(得分:0)

这是因为您的表单中没有任何输入字段。表单必须包含名为firstname的输入。

您可以通过转储$inputs字段来检查此问题。例如dd($inputs)。我确信在您的控制器中,此变量不包含任何名为firstname的索引,因为您的表单没有任何名为firstname的输入字段。

答案 1 :(得分:0)

这为我修好了。

composer update