technician/api/js/model/JsProjectCategoryModel.php

<?php
    /**
     * Created by PhpStorm.
     * User: Administrator
     * Date: 2020-09-07
     * Time: 14:29
     */
    
    namespace api\js\model;
    
    
    use think\Model;

    class JsProjectCategoryModel extends Model
    {
    
        
        public function project()
        {
            return $this->belongsToMany('JsProjectModel','js_project_category_relevancy','project_id','category_id');
            
        }
        
        
        
    }