Question

I have 2 models images and categories.

The relations are:

– a image belongs to one category.

– a category has many images.

On the index.html.erb view from categories object, I want paginate 20 images per page for all categories.

I mean, I want paginate all images from all categories with 20 images per page.

in my index action on categories_controller.rb method I have:

def index
    @categories = Category.all
    @categories.each do |category| 
     @images = Kaminari.paginate_array(category.images).page(1).per(1)
    end
    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @categories }
    end
   end

on index.html.erb I have:

<% @images.each do |image|%>

code for each image here

<% end %>  
<% paginate @images %>

But this for me it does not works. I can not see anything image showed.

how I can implement this functionality? and fix this problem? Thank you.

Answer 1

@categories.each do |category| 
  @images = Kaminari.paginate_array(category.images).page(1).per(1)
end

In this loop, you’re overriding @images each time, so obviously, you wont get what you expect 😉

I think that what you wanna do is:

@images = Image.where("category_id IS NOT NULL").page(params[:page]).per(20)

The .where("category_id IS NOT NULL") is not necessary if images have to belong to a category.