crm/app/model/CampPlan.php

<?php

namespace app\model;

use think\Model;

class CampPlan extends Model
{

    public function camp()
    {
        return $this->belongsTo(Camp::class);
    }

    public function trainDoneLog()
    {
        return $this->hasOne(TrainDoneLog::class,'class_id','con_id');
    }

    public function examEmpResult()
    {
        return $this->hasOne(ExamEmpResult::class,'paper_id','con_id');
    }
}