ruby-on-rails - 对记录数组进行两次排序，同时保持初始排序

Question

所以我对我的公司有以下查询 companies.where(行业:industry_queried)

我想对它们进行排序，以便返回的第一条记录是 plan_id == 3 的记录，然后是 2，然后是 1。(降序)

但是，我还想分别排列这 4 个部分，以便它们按名称的字母顺序排序。

我将如何在 Rails 5 中执行此操作？

Answer 1

活跃Record Query Interface guide ，为我们提供以下有关订购记录的信息。

4 Ordering

To retrieve records from the database in a specific order, you can use the order method.

For example, if you're getting a set of records and want to order them in ascending order by the created_at field in your table:

Customer.order(:created_at)
# OR
Customer.order("created_at")

You could specify ASC or DESC as well:

Customer.order(created_at: :desc)
# OR
Customer.order(created_at: :asc)
# OR
Customer.order("created_at DESC")
# OR
Customer.order("created_at ASC")

Or ordering by multiple fields:

Customer.order(orders_count: :asc, created_at: :desc)
# OR
Customer.order(:orders_count, created_at: :desc)
# OR
Customer.order("orders_count ASC, created_at DESC")
# OR
Customer.order("orders_count ASC", "created_at DESC")

将此应用于您的问题，您最终会得到:

companies.where(industry: industries_queried).order(plan_id: :desc, name: :asc)