x-server-mobile/backend/app/model/ApprovalRecord.php

<?php

namespace app\model;

use support\Model;

class ApprovalRecord extends Model
{
    protected $table = 'approval_record';

    protected $fillable = [
        'order_id',
        'node_id',
        'node_type',
        'approver_id',
        'action',
        'comment',
    ];

    protected $casts = [
        'created_at' => 'datetime',
    ];

    /**
     * 操作类型常量
     */
    const ACTION_SUBMIT = 'submit';   // 提交
    const ACTION_APPROVE = 'approve'; // 通过
    const ACTION_REJECT = 'reject';   // 拒绝
    const ACTION_CANCEL = 'cancel';   // 撤销

    /**
     * 关联审批单
     */
    public function order()
    {
        return $this->belongsTo(ApprovalOrder::class, 'order_id');
    }

    /**
     * 关联审批人
     */
    public function approver()
    {
        return $this->belongsTo(User::class, 'approver_id');
    }

    /**
     * 判断是否是批准操作
     */
    public function isApproved(): bool
    {
        return $this->action === self::ACTION_APPROVE;
    }

    /**
     * 判断是否是拒绝操作
     */
    public function isRejected(): bool
    {
        return $this->action === self::ACTION_REJECT;
    }
}