baoshi-was/app/StationTask.php

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class StationTask extends Model
{
    protected $fillable = ['status'];


    public function taskCommodities()
    {   //任务商品列表
        return $this->belongsToMany(StationTaskCommodity::class,"station_task_children","station_task_id","station_task_table_id")
            ->where("station_task_table_type","station_task_commodities");
    }
    public function taskBatches()
    {   //任务波次 目前为单个，取值时应取第一个即可
        return $this->belongsToMany(StationTaskBatch::class,"station_task_children","station_task_id","station_task_table_id")
            ->where("station_task_table_type","station_task_batches");
    }
    public function taskMaterialBoxes()
    {   //任务料箱
        return $this->belongsToMany(StationTaskMaterialBox::class,"station_task_children","station_task_id","station_task_table_id")
            ->where("station_task_table_type","station_task_material_boxes");
    }
}