在Eloquent属性中返回查询的模型

Question

我使用的是Laravel雄辩的ORM，并且希望能够将查询的laravel模型作为一个属性或更理想地作为雄辩的关系返回。 这就是我想要做的：

class CalendarEvent extends Model
{
    protected $appends = array('conflicts');

    public function getConflictsAttribute () {
        $conflicts =  CalendarEvent::where('calendar_event_type','=',$this->calendar_event_type)
                      ->where('start','<',$this->end)
                      ->where('end','>',$this->start)
                      ->get();   

        return $conflicts;
    }
}

这是一种尝试获取重叠的日历事件（该事件可能是有冲突的事件），并作为每个事件的对象返回。

然后，这意味着任何查询运行都将返回冲突：

$event = CalendarEvent::where('id','=',123)->first()->toJson();
$event; // JSON object should contain conflicting events

这将导致非Laravel 500错误和空白页。 存储器/日志/ laravel未附加。 我的/var/log/site-error.log在请求期间附加了以下内容：

PHP消息：PHP324。Illuminate \\ Database \\ Eloquent \\ Model-> attributesToArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2454 PHP消息：PHP 325.Illuminate \\ Database \\ Eloquent \\ Model-> mutateAttributeForArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2518 PHP消息：PHP326。Illuminate \\ Support \\ Collection-> toArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2764 PHP消息：PHP327。array_map（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate / Support / Collection.php：1103 PHP消息：PHP328。Illuminate\\ Support \\ Collection-> Illuminate \\ Support {closure}（）/ home / vagrant / silverback / httpdocs /vendor/laravel/framework/src/Illuminate/Support/Collection.php:1103 PHP消息：PHP329。Illuminate\\ Database \\ Eloquent \\ Model-> toArray（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Il luminate / Support / Collection.php：1102 PHP消息：PHP330。Illuminate \\ Database \\ Eloquent \\ Model-> attributesToArray（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate / Database / Eloquent / Model.php：2454 PHP消息：PHP331。Illuminate \\ Database \\ Eloquent \\ Model-> mutateAttributeForArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php： 2518 PHP消息：PHP332。Illuminate \\ Support \\ Collection-> toArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2764 PHP消息：PHP 333 。array_map（）/ home / vagrant / silverback / 2016/12/04 14:21:16 [错误] 792＃0：* 42880在stderr中发送的FastCGI：“ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate / Support / Collection.php：1103 PHP消息：PHP370。Illuminate\\ Support \\ Collection-> Illuminate \\ Support {closure}（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate /Support/Collection.php:1103 PHP 消息：PHP371。Illuminate\\ Database \\ Eloquent \\ Model-> toArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Support/Collection.php:1102 PHP消息：PHP 372。 \\ Database \\ Eloquent \\ Model-> attributesToArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2454 PHP消息：PHP373。Illuminate\\ Database \\ Eloquent \\ Model-> mutateAttributeForArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2518 PHP消息：PHP374。Illuminate\\ Support \\ Collection-> toArray（ ）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2764 PHP消息：PHP375。array_map（）/ home / vagrant / silverback / httpdocs / vendor / laravel /framework/src/Illuminate/Support/Collection.php:1103 PHP消息：PHP376。Illuminate\\ Support \\ Collection-> Illuminate \\ Support {closure}（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illumi nate / Support / Collection.php：1103 PHP消息：PHP377。Illuminate\\ Database \\ Eloquent \\ Model-> toArray（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate / Support / Collection。 php：1102 PHP消息：PHP378。Illuminate\\ Database \\ Eloquent \\ Model-> attributesToArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2454 PHP消息：PHP379。Illuminate \\ Database \\ Eloquent \\ Model-> mutateAttributeForArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2518 PHP消息：PHP 380 。Illuminate \\ Support \\ Collection-> toArray（）/ home / vagrant / silverback / httpdocs / vendor / larav 2016/12/04 14:21:16 [错误] 792＃0：* 42880在stderr中发送的FastCGI：“ ck / httpdocs / vendor / laravel / framework / src / Illuminate / Database / Eloquent / Model.php：2764 PHP消息：PHP417。array_map（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate / Support /Collection.php:1103 PHP消息：PHP 418。 lluminate \\ Support \\ Collection-> Illuminate \\ Support {closure}（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Support/Collection.php:1103 PHP消息：PHP419。Illuminate \\ Database \\ Eloquent \\ Model-> toArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Support/Collection.php:1102 PHP消息：PHP420。Illuminate\\ Database \\ Eloquent \\ Model-> attributeToArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2454 PHP消息：PHP421。Illuminate\\ Database \\ Eloquent \\ Model-> mutateAttributeForArray（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate / Database / Eloquent / Model.php：2518 PHP消息：PHP422。Illuminate\\ Support \\ Collection-> toArray（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate / Database / Eloquent / Model.php：2764 PHP消息：PHP423。array_map（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate / Support / Collec tion.php：1103 PHP消息：PHP424。Illuminate\\ Support \\ Collection-> Illuminate \\ Support {closure}（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Support/Collection.php ：1103 PHP消息：PHP425。Illuminate \\ Database \\ Eloquent \\ Model-> toArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Support/Collection.php:1102 PHP消息：PHP 426. Illuminate \\ Database \\ Eloquent \\ Model-> attributesToArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2454 PHP消息：PHP427。Illuminate \\ Database \\ Eloquent \\ Model-> mutateAttributeForArray（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate / Database / Eloquent / Mode 2016/12/04 14:21:16 [错误] 792＃0 ：* 42880 FastCGI在stderr中发送：“ e / Database / Eloquent / Model.php：2518 PHP消息：PHP464。Illuminate\\ Support \\ Collection-> toArray（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework /src/Illuminate/Database/Eloquent/Model.ph p：2764 PHP消息：PHP465。array_map（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Support/Collection.php：1103 PHP消息：PHP466。Illuminate\\ Support \\ Collection- > Illuminate \\ Support {closure}（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Support/Collection.php:1103 PHP消息：PHP467。Illuminate\\ Database \\ Eloquent \\ Model-> toArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Support/Collection.php:1102 PHP消息：PHP468。Illuminate\\ Database \\ Eloquent \\ Model-> attributesToArray（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate / Database / Eloquent / Model.php：2454 PHP消息：PHP469。Illuminate\\ Database \\ Eloquent \\ Model-> mutateAttributeForArray（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src / Illuminate / Database / Eloquent / Model.php：2518 PHP消息：PHP470。Illuminate\\ Support \\ Collection-> toArray（）/ home / vagrant / silverback / httpdocs / vendor / laravel /框架/ src / Illuminate / Database / Eloquent / Model.php：2764 PHP消息：PHP471。array_map（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Support/Collection.php:1103 PHP消息：PHP 472. Illuminate \\ Support \\ Collection-> Illuminate \\ Support {closure}（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Support/Collection.php:1103 PHP消息：PHP 473。 \\ Database \\ Eloquent \\ Model-> toArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Support/Collection.php:1102 PHP消息：PHP474。Illuminate\\ Database \\ Eloquent \\ Model -> attributesToArray（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Eloquent/Model.php:2454 PHP消息：PHP475。Illuminate\\ Database \\ Eloquent \\ Model-> mu 2016 / 12/04 14:21:16 [错误] 792＃0：* 42880 FastCGI在stderr中发送：“ ry \\ Grammars \\ MySqlGrammar-> wrapValue（）/ home / vagrant / silverback / httpdocs / vendor / laravel / framework / src /Illuminate/Database/Grammar.php:79 PHP消息：PHP 511. Illuminate \\ Database \\ Query \\ Grammars \\ MySqlGrammar-> isJsonSelector（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Query/Grammars/MySqlGrammar.php:225 PHP消息：PHP 512. Illuminate \\ Support \\ Str :: contains（）/home/vagrant/silverback/httpdocs/vendor/laravel/framework/src/Illuminate/Database/Query/Grammars/MySqlGrammar.php:255“，同时从上游读取响应标头，客户端：192.168.42.1，服务器：silverback.dev，请求：“ GET / test HTTP / 1.1”，上游：“ fastcgi：// unix：/var/run/php5-fpm.sock：”，主机：“ silverback。开发”

更新：我已经决定使用雄辩的ORM不可能做到这一点。 我本质上想做的是像这样的Mysql，以关系形式附加：

select * from calendar_events as calendar_events_2 where calendar_events_2.start < calendar_events_1.end AND calendar_events_2.end > calendar_events_1.start

取而代之的是，我无意中选择了foreach循环来将数据提取后附加。 我相信这是我唯一的选择。

foreach ($shoot_timeline_data as $shoot) {
    foreach ($shoot->booking_cases as $booking_case) {
        $booking_case->booking->conflicts = CalendarEvent::find_clashes(
            $booking_case->booking->calendar_event_type, 
            $booking_case->booking->start, 
            $booking_case->booking->end,
            [$booking_case->booking->id] // excludes this ID via 'whereNotIn'
        );
    }
}

Answer 1

该错误似乎是由附加属性引起的，在该属性中您试图在数组中获取其他模型实例。 一种不同的方法可能是定义关于自我的关系，例如

class CalendarEvent extends Model{
    public function conflicts()
    { 
        return  $this->hasMany(CalendarEvent::class)
                ->where('calender_event_type','=', $this->calendar_event_type);
    }
}  

然后您可以尝试查询为

$event = CalendarEvent::where('id','=',123)->with('conflicts')->first()->toJson();  

尚未测试，但尝试查看是否可行。

编辑

尝试在延迟加载中使用参数

$event = CalendarEvent::where('id', '=', 123)->first();
or
$event = CalendarEvent::findOrFail(123);  //it will find the record by given primary key - 123 or fail i.e. throw 'MODELNOTFOUNDEXCEPTION'

$start = $event->start;
$end = $event->end;
$event->load('conflicts', function($query) use ($start, $end){
          $query->where('start', '<', $start)
                ->where('end', '>', $end)
        })->get();

Answer 2

您需要退货

class CalendarEvent extends Model
{
    protected $appends = array('conflicts');

    public function getConflictsAttribute () 
    {
        return CalendarEvent::where('calendar_event_type','=',$this->calendar_event_type)
                      ->where('start','<',$this->end)
                      ->where('end','>',$this->start)
                      ->get();   
    }
}