erp_yzx/app/common/model/ActivityProductModel.php

<?php


namespace app\common\model;



class ActivityProductModel extends BaseModel
{

    protected $table = 'erp_activity_product';

    protected function genSchema(array $schema)
    {
        // TODO: Implement genSchema() method.
    }

    public function product() {
        return $this->hasOne(ProductModel::class,'id','product_id');
    }

    public function doesItExist($product_id) {
        return $this->where([
            ["product_id", '=', $product_id],
            ["is_delete", '=', 0]
        ])->find();
    }


}