Deal with yii2 dataprovider and related tables?

Question

Yii

There are 4 tables

1. Product
   
2. Prices
   
3. Countries
   
4. Warehouses
   

Products -> one to many -> Prices
Products -> one to many -> warehouse
Warehouse -> many to one -> countries
Rendering a page where Products with prices are displayed.
You need to add a filter by country. Those. by product, find warehouses in which there is a product in the selected country.

Answer 1

www.yiiframework.com/wiki/653/displaying-sorting-a... - everything you need is here