使用Sqldataprovider时，过滤器gridview不起作用

Question

这是我的模特搜索：

public function search($params)
    {
        $query = "select distinct number, 
                                  id, 
                                  write_date::date,
                                  customer_id,
                                  customer_name,
                                  sales.name,
                                  sales.id as sales_id  
                  from item 
                  inner join sales on sales.id = pa.sales_id
                  where status = 'oke' 
                  order by write_date::date
                 ";

        // add conditions that should always apply here

        $dataProvider = new SqlDataProvider([
            'sql' => $query,
        ]);

        $this->load($params);

        if (!$this->validate()) {
            // uncomment the following line if you do not want to return any records when validation fails
            // $query->where('0=1');
            return $dataProvider;
        }

        return $dataProvider;
    }

这个模型搜索工作正常，可以在gridview上加载数据，但过滤它不起作用。谁能帮我？感谢。