我一直在为我的图书馆应用程序研究搜索功能,这是我的第一个Laravel项目,所以我有点挣扎。我终于找到了搜索功能,可以在其中按书名搜索一本书,但是,我无法显示该表中没有的任何搜索数据。如果我运行搜索,则会收到以下错误消息:
Facade\Ignition\Exceptions\ViewException
Undefined property: stdClass::$authors (View: /Users/krisz/code/project/resources/views/books/index.blade.php)
我已经在'books'和'authors'之间创建了一个数据透视表,如果我只想在索引页面上显示数据而不进行搜索,则可以使用,但是在搜索之后,我无法使其正常工作。另外,如果我从index.blade.php中“ books”表之外的所有数据删除,搜索将正常进行。
您能帮我解决这个问题吗?
BookController:
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Book;
use App\Language;
use App\Genre;
use App\Author;
use App\Publisher;
use App\User;
use Illuminate\Support\Facades\DB;
class BookController extends Controller
{
public function index(Request $request)
{
$books = Book::with('language')->get();
$books = Book::with('user')->get();
$languages = Language::all();
$genres = Genre::all();
$publishers = Publisher::all();
$users = User::all();
$authors = Author::all();
return view('books/index', compact('books','languages','genres','publishers','users'));
}
public function search(Request $request)
{
$authors = Author::all();
$books = Book::with('language')->get();
$books = Book::with('user')->get();
$languages = Language::all();
$genres = Genre::all();
$publishers = Publisher::all();
$users = User::all();
$search = $request->get('search');
$books = DB::table('books')->where('title','like','%' .$search. '%')->paginate(5);
return view('books/index')->with(compact('books','languages','genres','authors','publishers','users'));
}
}
index.blade.php:
@extends('layout')
@section('title')
<title>Alle Bücher</title>
@section('content')
<style>
.uper {
margin-top: 40px;
}
</style>
<div class="uper">
@if(session()->get('success'))
<div class="alert alert-success">
{{ session()->get('success') }}
</div><br />
@endif
<div align="left">
<div class="col-md-4">
<h1>Policy</h1>
</div>
<div class="col-md-4">
<form action="{{ route('search') }}" method="get" role="search">
{{ csrf_field() }}
<div class="input-group">
<input type="text" class="form-control" name="search" placeholder="Search Title" <span class="input-group-btn">
<button type="submit" class="btn btn-primary">Search</button></span>
</div>
</form>
</div>
</div>
<table class="table table-hover">
<thead>
<tr>
<td>ID</td>
<td>Titel</td>
<td colspan="2">Autor</td>
<td>Jahr</td>
<td colspan="2">Verlag</td>
<td colspan="2">Genre</td>
<td>Sprache</td>
<td>ISBN</td>
<td>Seitenzahl</td>
<td>Ausgeliehen von:</td>
<td colspan="2">Funktionen</td>
</tr>
</thead>
<tbody>
@foreach($books as $book)
<tr>
<td>{{$book->id}}</td>
<td>{{$book->title}}</td>
@foreach($book->authors as $author)
<td>{{$author->name}}</td>
@endforeach
<td>{{$book->year}}</td>
@foreach($book->publishers as $publisher)
<td>{{$publisher->name}}</td>
@endforeach
@foreach($book->genres as $genre)
<td>{{$genre->name}}</td>
@endforeach
<td>{{$book->language->name}}</td>
<td>{{$book->isbn}}</td>
<td>{{$book->pages}}</td>
<td>{{$book->user->name}}</td>
<td><a href="{{ route('books.edit', $book->id)}}" class="btn btn-primary">Bearbeiten</a></td>
<td>
<form action="{{ route('books.destroy', $book->id)}}" method="post">
@csrf
@method('DELETE')
<button class="btn btn-danger" type="submit">Löschen</button>
</form>
</td>
</tr>
@endforeach
</tbody>
</table>
<div>
@endsection
您将获得$ authors为未定义状态,因为它未通过索引函数传递给视图,并且在视图中不可访问。
将其传递到紧凑视图
return view('books/index', compact('books','languages','genres','publishers','users', 'authors'));
这可能会解决问题
首先,您只是在这里覆盖自己:
$books = Book::with('language')->get();
$books = Book::with('user')->get();
我怀疑您同时需要language
和user
,并且您可能想要authors
以及您尝试在视图中获取的其他数据?
$books = Book::with(['language', 'user', 'authors', 'publishers', 'genres'])->get();
[不确定您得到的错误,因为$book
应该是App\Book
的实例,而不是stdClass
,但我怀疑您没有显示某些代码,或者您的模型没有正确定义。