baoshi-was/app/Package.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Package extends Model
{
    protected $fillable=[
        'owner_id','logistic_number','delivery_number','batch_number','batch_rule','recipient','recipient_mobile','logistics_id',
        'measuring_machine_id','weight','length','width','height','bulk','paper_box_id','status'
    ];
    protected $appends=[
        'owner_name',
        'logistic_name',
        'measuringMachine_name',
        'paperBox_name'
    ];

    public function owner(){
        return $this->belongsTo('App\Owner','owner_id','id');
    }

    public function logistic(){
        return $this->belongsTo('App\Logistic','logistic_id','id');
    }

    public function measuringMachine(){
        return $this->belongsTo('App\MeasuringMachine','measuring_machine_id','id');
    }

    public function paperBox(){
        return $this->belongsTo('App\paperBox','paper_box_id','id');
    }

    public function getOwnerNameAttribute()
    {
        return $this['owner']? $this['owner']['name']:null;
    }
    public function getLogisticNameAttribute(){
        return $this['logistic']? $this['logistic']['name']:null;
    }
    public function getMeasuringMachineNameAttribute(){
        return $this['measuringMachine']? $this['measuringMachine']['name']:null;
    }
    public function getPaperBoxNameAttribute(){
        return $this['paperBox']? $this['paperBox']['model']:null;
    }
}