Rails - Mar 2008 - pagination for an object array

def show_details

@sd_ticket = ServiceDeskTicket.find(params[:id])
@servicedesk_cis = @sd_ticket.service_desk_cis

end


What I need is a pagination for @servicedesk_cis using the custom
pagination..How can i give offset and limit to this?

I have successfully done previously custom pagination in another def as
below


def search_sd_ticket
    @search_sd_ui_hash=params[:sd_ticket]
    @sd_ticket_number=@search_sd_ui_hash[:number]
          @sd_ticket_name = @search_sd_ui_hash[:name]

          # step 1: set the variables you''ll need
            page = (params[:page] ||= 1).to_i
            items_per_page = 20
            offset = (page - 1) * items_per_page

      # step 2: instead of performing the full find, just find the
record count

            @search_sd_ticket_count_result
ServiceDeskTicket.find_where(:all,:select=>''count(*) as
count1'' ) do
|sd|
                                     sd.number.downcase =~
"%"+@sd_ticket_number.downcase+"%" if
!@sd_ticket_number.nil?
                                     sd.name== @sd_ticket_name

                                 end

            record_count = @search_sd_ticket_count_result[0].count1.to_i

            # step 3: create a Paginator, the second variable has to be
the number of ALL items on all pages
            @search_sd_ticket_result_pages = Paginator.new(self,
record_count, items_per_page, page)

            # step 4: only find the requested subset of
@search_sd_ticket_result
            @search_sd_ticket_result
ServiceDeskTicket.find_where(:all,:offset=>offset,:limit=>items_per_page
) do |sd|
                                     sd.number.downcase =~
"%"+@sd_ticket_number.downcase+"%" if
!@sd_ticket_number.nil?
                                     sd.name== @sd_ticket_name
                                end
  end



But here i directly gave offset and limit in find_where.So how can i
apply this to my case?ie,

@servicedesk_cis = @sd_ticket.service_desk_cis    #suppose contain 100
total records and i need as in my suucessful case 20 records per page..


Please help
Sijo
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Hi Sijo

I''m a bit confused by your example (ie too lazy to read it all 
properly), but what i usually do for custom pagination is to do a custom 
query to get the ids of the records i want, put them (the ids) in an 
array, and then do a paginated query for records whose id''s are in the 
array.

eg

@records = Record.paginate(
  :conditions => ["id in (?)", 
all_the_records_i_want_to_paginate.collect(&:id)],
  :page => params[:page] || 1,
  :per_page => 15)

Effectively you do two queries: one that gets everything, and then 
another that paginates across it.  So, it''s a bit clumsy maybe but you 
can often get the array of all required ids relatively efficiently.
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