我们如何使用 apiresources laravel 将多个关系合并到一维数组中

Posted 2023-02-16

【中文标题】我们如何使用 apiresources laravel 将多个关系合并到一维数组中

【英文标题】：how can we merge multiple relation into one dimensional array using apiresources laravel

【发布时间】：2021-01-26 17:38:09

【问题描述】：

关系定义如下：

class Rfid extends Model

    use HasFactory;

    public function logs()
    
        return $this->hasMany('App\Models\ComponentLog', 'rfid_id');
    


class ComponentLog extends Model

    use HasFactory;

    public function reader()
    
        return $this->belongsTo('App\Models\RfidReader','rfid_reader_id');
    


class RfidReader extends Model implements AuthenticatableContract

    use HasFactory;
    use HasApiTokens;
    use Authenticatable;

    public function department()
    
        return $this->belongsTo('App\Models\Department', 'department_id');
    

在查询Rfid::with('logs.reader.department')->get() 时，结果如下：

App\Models\Rfid #4554
         id: 13,
         RFID: "KDtCgimCJJ",
         department_id: 6,
         component_id: 13,
         created_at: "2020-10-12 10:48:32",
         updated_at: "2020-10-12 10:48:32",
         logs: Illuminate\Database\Eloquent\Collection #4599
           all: [
             App\Models\ComponentLog #4576
               id: 13,
               rfid_id: 13,
               check_in: "2020-10-12 10:48:32",
               check_out: null,
               rfid_reader_id: 4,
               created_at: null,
               updated_at: null,
               reader: App\Models\RfidReader #4421,
             ,
           ],
         ,
       ,...

但是，我希望使用 apiresources 合并它的关系。

【问题讨论】：

每个 Rfid 都有许多日志。如何附加logs 表的字段？

他们可以通过任何方式使用 apiresources...

能贴出你想要的对象的结构吗？

我希望它为 RFID,DEPARTMENT_NAME,RFID_READER_ID,CHECK_IN,CHECK_OUT

【参考方案1】：

第一步：定义一个ComponentLog -> Rfid belongsTo 关系

class ComponentLog extends Model

    use HasFactory;

    public function reader()
    
        return $this->belongsTo('App\Models\RfidReader','rfid_reader_id');
    

    public function rfid()
    
        return $this->belongsTo('App\Models\Rfid', 'rfid_id');
    

第二步：从ComponentLog中获取结果，避免hasMany关系

$logs = ComponentLog::with(['rfid', 'reader.department'])->get();

第 3 步：绘制结果

$logs->transform(function ($log) 
    return [
        'rfid' => $log->rfid->rfid,
        'department_name' => $log->reader->department->department_name,
        'rfid_reader_id' => $log->rfid_reader_id,
        'check_in' => $log->check_in,
        'check_out' => $log->check_out
    ];
);

你也可以内联。

$logs = ComponentLog::with(['rfid', 'reader.department'])
->get()
->transform(function ($log) 
    return [
        'rfid' => $log->rfid->rfid,
        'department_name' => $log->reader->department->department_name,
        'rfid_reader_id' => $log->rfid_reader_id,
        'check_in' => $log->check_in,
        'check_out' => $log->check_out
    ];
);