php - 在 laravel Eloquent 结果中添加额外的键

Question

我有一个 Laravel 查询生成器结果，如下所示

{
  "data": [
    {
      "id": "",
      "awardID": 2,
      "title": "Dummy title",
      "status": "active",
      "raceStart":"",
      "raceEnd:":""
    }
  ]
}      

我想要输出的是这样的

{
  "data": [
    {
      "id": "",
      "awardID": 2,
      "title": "Dummy title",
      "status": "active",
      "period": {
        "raceStart":"",
        "raceEnd:":""
      }
    }
  ]
} 

如果期间是一个与父表具有 1 对 1 关系的表，那么这会容易得多，但这里的情况并非如此。 如何才能实现这一目标？

Answer 1

检查这是否有效。我还没有尝试过，但根据文档我们可以添加访问器和修改器。但它会改变您对模型所做的每一个响应。

使用 Eloquent

// Your Model
class Race extends Model
{
    {...}
    protected $appends = ['period'];
    // accessor
    public function getPeriodAttribute($value)
    {  
        $this->attributes['period'] = (object)[];
        $this->attributes['period']['raceStart'] = $this->attributes['raceStart'];
        $this->attributes['period']['raceEnd'] = $this->attributes['raceEnd'];
        unset($this->attributes['raceStart']); = $value;
        unset($this->attributes['raceEnd']);
        return $this->attributes['period'];
    }
}

现在，当您访问 $race->period 时，将给出 raceStart 和 raceEnd 值。

引用号:https://laravel.com/docs/5.4/eloquent-mutators#accessors-and-mutators

另外一个选择是在查询后，做一个 map

{...}
->map(function($data) {
    $data->period = (object)[];
    $data->period['raceStart'] = $data->raceStart;
    $data->period['raceEnd'] = $data->raceEnd;
    unset($data->raceStart);
    unset($data->raceEnd);
    return $data;
});

引用号:https://laravel.com/docs/5.4/eloquent-collections#introduction

使用查询生成器

$races = DB::table('races')->get();

$races = array_map(function ($data) {
    $data->period = (object)[
        "raceStart" => $data->raceStart,
        "raceEnd" => $data->raceEnd
    ];
    unset($data->raceStart);
    unset($data->raceEnd);
    return $data;
}, $races->data);