Question

我遇到了一个小问题，由于某种原因，我无法从关系模型中访问我的属性。

我一直收到同样的错误，'未定义属性：Illuminate \ Database \ Eloquent \ Collection :: $ season'

我一整天都在盯着这个，但我找不到解决办法。

<?php namespace App\Http\Controllers;

use App\Show;
use App\Episode;

class TestController extends Controller {

    public function test(){

         $shows = Show::where('active',1)->get();
        foreach ($shows as $show) {
            if($show->active == 1 && $show->airday == date('N'))
            {
                echo 'test';
                $episode = $show->episodes()->orderBy('id', 'desc')->take(1)->get();
                \Debugbar::info($episode);
                //this is the line where he gives me
                echo('New episodes avaible, Season '.$episode->season.' Episode '.$episode->episode.' From '.$show->name);
                //end error
            }
        }

    }
}

?>

虽然如果我打印出$ episode变量，我可以清楚地看到我想要访问的属性。

Illuminate\Database\Eloquent\Collection {#150
  #items: array:1 [
    0 => App\Episode {#241
      #table: "episodes"
      +timestamps: true
      #connection: null
      #primaryKey: "id"
      #perPage: 15
      +incrementing: true
      #attributes: array:6 [
        "id" => "6"
        "show_id" => "6"
        "season" => "3"
        "episode" => "15"
        "created_at" => "2016-02-07 11:45:53"
        "updated_at" => "2016-02-07 11:45:53"
      ]
      #original: array:6 [
        "id" => "6"
        "show_id" => "6"
        "season" => "3"
        "episode" => "15"
        "created_at" => "2016-02-07 11:45:53"
        "updated_at" => "2016-02-07 11:45:53"
      ]
      #relations: []
      #hidden: []
      #visible: []
      #appends: []
      #fillable: []
      #guarded: array:1 [
        0 => "*"
      ]
      #dates: []
      #dateFormat: null
      #casts: []
      #touches: []
      #observables: []
      #with: []
      #morphClass: null
      +exists: true
      +wasRecentlyCreated: false
    }
  ]

目前我对这段代码有什么不妥之处。我希望有人能指出我正确的方向。

Answer 1

当你致电->take(1)->get()时，你告诉Eloquent（建造者，真的）给你一个Collection对象，其中包含1个项目。

因此，当您尝试访问$season属性时，您实际上是尝试在Collection对象上访问它，而不是您认为的模型。

你可以做几件事：

您可以将->take(1)->get()来电替换为->first()，
或者您可以将当前的$episode变量视为一个集合，并通过访问$episode[0]，
或者您可以在当前first变量（$episode）上致电$episode = $episode->first()以获取其中的第一个模型对象。

Laravel 5无法从模型访问属性

1 个答案: