Question

我想以下列方式修改关系的结果集

我有这个数组


    array:11 [▼
      "id" => 1
      "user_id" => 1
      "name" => "Test Case"
      "created_at" => "2017-08-25 17:12:26"
      "updated_at" => "2017-08-29 11:59:46"
      "hashid" => "5LOkAdWNDqgVomK"
      "user" => array:8 [▶]
      "order" => array:8 [▶]
      "classification" => array:2 [▼
        0 => array:9 [▼
          "id" => 1
          "case_id" => 1
          "method" => "facial_map_manual"
          "strong" => 2.0
          "dynamic" => 30.0
          "delicate" => 50.0
          "calm" => 18.0
          "created_at" => "2017-08-31 11:00:00"
          "updated_at" => "2017-08-31 11:00:00"
        ]
        1 => array:9 [▼
          "id" => 2
          "case_id" => 1
          "method" => "interview"
          "strong" => 20.0
          "dynamic" => 25.0
          "delicate" => 30.0
          "calm" => 25.0
          "created_at" => "2017-08-31 11:00:00"
          "updated_at" => "2017-08-31 11:00:00"
        ]
      ]
      "classification_data" => array:3 [▼
        0 => array:6 [▼
          "id" => 1
          "case_id" => 1
          "type" => "facial_points"
          "data" => null
          "created_at" => "2017-08-31 11:00:00"
          "updated_at" => "2017-08-31 11:00:00"
        ]
        1 => array:6 [▼
          "id" => 2
          "case_id" => 1
          "type" => "interview"
          "data" => array:4 [▶]
          "created_at" => "2017-08-31 12:00:00"
          "updated_at" => "2017-08-31 11:00:00"
        ]
        2 => array:6 [▶]
      ]
      "teeth_configuration" => array:6 [▶]
    ]

我想按列加载关系的列键（类型OR方法）映射分类和 classification_data 。这是查询：

 $case = RCase::with(['user','order','classification','classificationData','teethConfiguration'])->where('id',$id)
                    ->first();

这是我到目前为止所尝试的

$case->classificationData =  $case->classificationData->keyBy('type')->toArray();

使用第一种方法，它们按类型排序，但即使尝试

 unlink($case->classification_data)

，旧的 classification_data 也会保留在那里这不是大问题......我也可以用分类来做到这一点，但数据保持不变。

我是否有任何方法可以在加载的关系模型中直接执行keyBy（）？提前致谢

PHP Version: 7.1
Laravel Version: 5.4.38
OS: Ubuntu 16.04 LTS

Answer 1

您可以使用此代码替换关系：

$case->setRelation("classification_data",$case->classificationData->keyBy('type'));

要替换关系，您必须提供相同的关系名称，否则laravel将创建另一个关系。

当你这样做时：

$case->classificationData = something

您实际上是在模型对象中添加新属性。

Laravel Eloquent关系keyBy（）

1 个答案: