fdesk/app/admin/model/ApprovalRecords.php

<?php

namespace app\admin\model;

use app\common\model\User;
use support\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class ApprovalRecords extends Model
{
    /**
     * The connection name for the model.
     *
     * @var string|null
     */
    protected $connection = 'mysql';
    
    /**
     * The table associated with the model.
     *
     * @var string
     */
    protected $table = 'approval_records';

    /**
     * The primary key associated with the table.
     *
     * @var string
     */
    protected $primaryKey = 'id';

    /**
     * Indicates if the model should be timestamped.
     *
     * @var bool
     */
    public $timestamps = false;
    
    
    protected $dateFormat = 'U';

    /**
     * 允许自动填充模型字段
     */
    // protected $fillable = ['id', 'instance_id', 'approver_id', 'step_index', 'action', 'status', 'comment', 'approved_at', 'created_at', 'updated_at'];

    /**
     * 不允许自动填充模型字段
     */
    protected $guarded = [];


    protected $fillable = [
        'instance_id',
        'approver_id',
        'step_index',
        'action',
        'status',
        'comment',
        'approved_at',
    ];

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

    /**
     * 一条审批记录属于一个审批实例
     */
    public function approvalInstance(): BelongsTo
    {
        return $this->belongsTo(ApprovalInstances::class, 'instance_id');
    }

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