ruby-on-rails - Is there a way to order the results of a query with a non standard order?

Question

My site allows users to change the order in which categories and what categories are displayed, and it stores that order as an array in the db. so I have:

@categories = Category.where("id IN (?)", current_user.order)

the problem is order is something like [2,4,3,6,1] and then @categories has order [1,2,3,4,6]. I want to order the @categories so it matches the order. Any help would be appreciated

Answer 1

将用户首选项存储在单独的表中，然后使用 @categories 加入 userOrderTable

Answer 2

另一种方法可能是创建一个空数组并遍历类别：

@categories = []
current_user.order.each do |category_id|
 @categories << Category.find(category_id)
end