rails-joins

Ordering::Item.joins(:category)
.where(ordering_categories: {categorizable_type: "Ordering::Special"})
#           ^ vezi cum e ordering_categories si nu doar categories, deci fac join la doar categories

 Ordering::Category
 joins("RIGHT JOIN ordering_specials ON ordering_specials.id = ordering_categories.id")
 # join si pun eu fieldul de join
 .where("ordering_specials.locked = ?", true)
 .where("ordering_specials.menuable_type = ?", "Restaurant")