api-szy-demo/app/Models/Enroll.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Enroll extends Model
{
    protected $table='enroll';

    public function get_gift(){
        return $this->hasOne(Gift::class,'season','season');
    }

    public function get_user(){
        return $this->belongsTo(User::class,'user_id');
    }

    public function get_code(){
        return $this->belongsTo(Code::class,'user_id','user_id');
    }

    public function get_dwbs_user(){
        return $this->hasOneThrough(DwbsUser::class,User::class,'user_id','id','id','dwbs_id');
    }
    public function user(){
        return $this->belongsTo(User::class,'user_id','id');
    }

    public function code(){
        return $this->belongsTo(Code::class,'user_id','user_id');
    }

    public function usera(){
        return $this->belongsTo(DwbsUser::class,'user_id');
    }

    public function userc(){
        return $this->hasManyThrough(
            'App\Models\DwbsUser',
            'App\Models\User',
            'dwbs_id',
            'user_id',
            'id',
            'id'
        );
    }
}