collector_producer/app/Model/Article.php

<?php

declare(strict_types=1);

namespace App\Model;

use Hyperf\DbConnection\Model\Model;

/**
 */
class Article extends Model
{
    /**
     * The table associated with the model.
     */
    protected ?string $table = 'article';

    /**
     * The attributes that are mass assignable.
     */
    protected array $fillable = [];

    /**
     * The attributes that should be cast to native types.
     */
    protected array $casts = [];
    public function rule()
    {
        return $this->belongsTo(Rule::class,'rule_id','id');
    }
    public function category()
    {
        return $this->belongsTo(OldModel\Category::class, 'catid','id');
    }
}