how to add sorted elements in the filter dropdown in activeadmin rails

Question

I have a Post model, PostSource model. A PostSource has many posts, a post belong to one PostSource.

Using ActiveAdmin, in the Index action of the Post, I am displaying a filter of PostSource this way:

filter :post_source, label: 'Source'
filter :category, as: :select, collection: Category.order(:name).collect { |cat| [cat.name, cat.id] }

with the controller as:

controller do
  def scoped_collection
    end_of_association_chain.includes(:post_source)
  end
end

It displays the source, but does not display in a sorted order. How to sort the filter in this case?

I tried adding sortable, order on filter but it does not seem to work

Answer 1

If you're trying to sort the first filter ('post_source'), you could just add a collection as you have in your second line, and sort within a block.

filter :post_source, label: 'Source', collection: proc { PostSource.order(:name) }

This syntax might be used as an alternative in the second example as well.