Rails: Using will_paginate with a complex association find

Question

I\'m encountering a problem with will_paginate while doing a complex find.

:photo  has_many   :tags,   :through => :tagships
:item   has_many   :photos
:p         


        

Answer 1

FYI, here's what I finally found to fix this:

@photos = WillPaginate::Collection.create(current_page, per_page) do |pager|
    result = @item.photos.find :all, :conditions => [ 'tags.id IN (?)', tag_ids] ,:order => 'created_at DESC', :joins => :tags, :group => "photos.id HAVING COUNT(DISTINCT tags.id) = #{@tags.count}", :limit => pager.per_page, :offset => pager.offset
    pager.replace(result)

    unless pager.total_entries
      pager.total_entries = @item.photos.find(:all, :conditions => [ 'tags.id IN (?)', tag_ids] ,:order => 'created_at DESC', :joins => :tags, :group => "photos.id HAVING COUNT(DISTINCT tags.id) = #{@tags.count}").count
    end
  end

You have to manually construct the paginated set using the page number as an offset and using the tags to make a join query. Kinda clunky.