how do i make pages show by categories (sections)

i am using active admin to create a blog and i created sections which has_many :pages, if i click on the section, it shows me the section mane cause i used `

<%= @section.name %>

, i want when i click on a section, it shows me all the pages in that section

here's my code show.html.erb

<h1><%= @section.name %></h1>

<% @catSections.each do |section| %>
    <p><%= link_to section.name, section_path(section.id) %></p>
<% end %>

admin/section.rb

ActiveAdmin.register Section do
>     permit_params :name
> index do
>     column :id
>     column :name, :sortable => :name
>     actions end
> 
>     form do |f|
>         f.inputs "Details" do
>             f.input :name, :label => "Name"
>             f.actions
>         end
>     end
> 
> end

application_controller.rb

class ApplicationController < ActionController::Base
    before_action :getAsideSection, :getCatSection, :getHeadCarousel
    def hhome

    end

    def getAsideSection
        @asideSections = Page.all
    end

    def getCatSection
        @catSections = Section.all
    end

    def getHeadCarousel
        @headCarousel = Carousel.all
    end
end

admin/page.rb

ActiveAdmin.register Page do
    permit_params :title, :body, :order, :is_published, :section_id, :menu_display

index do
    column :id
    column :title, :sortable => :title
    column :section, :sortable => :section
    column :created_at, :sortable => :created_at
    column :order
    actions
end

    form do |f|
        f.inputs "Details" do
            f.input :title, :label => "Title"
            f.input :section, :label => "Section"
            f.input :body, as: :html_editor, :label => "Body"
            f.input :order, :label => "Order"
            f.input :is_published, :label => "Published"
            f.input :menu_display, :label => "Display in Menu"
            f.actions
        end
    end

end