Question

我无法在我的刀片文件中的@foreach语句中显示数据库中的结果。我根本没有任何错误。

控制器文件：

public function index()
    {
        /**
         * Retrieve all articles
         * where status is published [1]
         * and order them by published date decending
         *
         * @var  articles
         */

        $articles = Article::where( function($query) {
            return $query
                ->where('eHArt_Status', '1')
                ->orderBy('published_at', 'desc')
                ->paginate(10);
        });

        // return articles feed
        return view('build.4-.feeds.articles')->with('articles', $articles);
    }

我的数据库模型：

class Article extends Authenticatable
{
    /**
     * The database table used by the model
     * 
     * @var string
     */
    protected $table = 'eHArticle';

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        // fillable article fields
        'eHArt_OldArtID',
        'eHArt_Title',
        'eHArt_Content',
        'eHArt_Author',
        'eHArt_Status',
        'eHArt_Img',
        'published_at'
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        // no hidden fields
    ];
}

我的观看文件：

@section('feed')
    <!-- check if there is articles -->
    @if ( !$articles->count() )
        <p>No articles</p>
    @else
        @foreach ( $articles as $article )
            <p>Article</p>
        @endforeach
    @endif
@endsection

如果我采取＆＃34;！＆＃34;远离$articles->count()我可以看到字符串＆＃34;没有文章＆＃34;，但我的foreach没有显示任何内容。

做dd（$ articles）

Builder {#159 ▼
  #query: Builder {#158 ▼
    #connection: MySqlConnection {#154 ▶}
    #grammar: MySqlGrammar {#155 ▶}
    #processor: MySqlProcessor {#156}
    #bindings: array:6 [▶]
    +aggregate: null
    +columns: null
    +distinct: false
    +from: "eHArticle"
    +joins: null
    +wheres: array:1 [▶]
    +groups: null
    +havings: null
    +orders: null
    +limit: null
    +offset: null
    +unions: null
    +unionLimit: null
    +unionOffset: null
    +unionOrders: null
    +lock: null
    #backups: []
    #bindingBackups: []
    #operators: array:26 [▶]
    #useWritePdo: false
  }
  #model: Article {#152 ▼
    #table: "eHArticle"
    #fillable: array:7 [▶]
    #hidden: []
    #connection: null
    #primaryKey: "id"
    #perPage: 15
    +incrementing: true
    +timestamps: true
    #attributes: []
    #original: []
    #relations: []
    #visible: []
    #appends: []
    #guarded: array:1 [▶]
    #dates: []
    #dateFormat: null
    #casts: []
    #touches: []
    #observables: []
    #with: []
    #morphClass: null
    +exists: false
    +wasRecentlyCreated: false
  }
  #eagerLoad: []
  #macros: []
  #onDelete: null
  #passthru: array:11 [▶]
  #scopes: []
}

Answer 1

如果使用Builder，请在查询后使用get（）方法。

$articles = Article::where( function($query) {
            return $query
                ->where('eHArt_Status', '1')
                ->orderBy('published_at', 'desc')
                ->paginate(10);
        })->get();

否则您应该将查询更改为

$articles = Article::where('eHArt_Status', '1')->orderBy('published_at', 'desc')->paginate(10);

请参阅此https://laravel.com/docs/5.1/pagination#paginating-eloquent-results和https://laravel.com/docs/5.1/pagination#displaying-results-in-a-view

您需要在<p>代码{{$article}}

中回复它

@section('feed')
    @if(count($articles))
        @foreach ( $articles as $article )
            <h1>{{$article->eHArt_Title}}</h1>
            <p>{{$article->eHArt_Content}}</p>
        @endforeach
    @else
        <p>No articles</p>
    @endif
@endsection
{!! $articles->render() !!}

Answer 2

使用if(count($articles) > 0)：

@section('feed')
    <!-- check if there is articles -->
    @if(count($articles) > 0)
        @foreach ($articles as $article)
            <p>Article</p>
        @endforeach
    @else
        <p>No articles</p>
    @endif
@endsection

您可以在the documentation中详细了解count()方法。

此外，您应该使用此查询来获得正确的结果：

Article::where('eHArt_Status', '1')->orderBy('published_at', 'desc')->paginate(10);

Laravel 5：@foreach没有显示结果

2 个答案: