Comments on: Faster Pagination in Rails

By: Thinking sphinx and paginating find | Muziboo Development Blog

Thinking sphinx and paginating find | Muziboo Development Blog — Thu, 14 May 2009 17:33:22 +0000

[...] the paginating find plugin to paginate results. You can find a great tutorial on paginating find at Ilya’s blog. Thinking sphinx however works only with will paginate plugin (atleast out of the box) and needs to [...]

By: Ilya Grigorik

Ilya Grigorik — Thu, 19 Feb 2009 02:51:05 +0000

You shouldn’t need window_helper for will_pagination as it provides its own equivalent implementation as part of the plugin. Check the RDOC for some examples, and here is a screencast worth checking out: http://railscasts.com/episodes/51

By: ahmadisa

ahmadisa — Tue, 17 Feb 2009 08:14:05 +0000

hi ilya …
can you help me??
how to implement window_helper.rb if I used will_pagination??

By: Zeba

Zeba — Mon, 19 Jan 2009 09:48:04 +0000

Thanks for the help Jeff…
I tried your solution but It didn’t seem to take “ModelName.paginate_by_sql” and gives me an error as:
undefined method `paginate_by_sql’ for #

In my environment.rb the code I have is:
module ActiveRecord
module ConnectionAdapters
class SQLServerAdapter
def add_limit_offset!(sql, options)
puts sql
options[:offset] ||= 0
options_limit = options[:limit] ? “TOP #{options[:limit]}” : “”
options[:order] ||= if order_by = sql.match(/ORDER BY(.*$)/i)
order_by[1]
else
sql.match(’FROM (.+?)\b’)[1] + ‘.id’
end
sql.sub!(/ORDER BY.*$/i, ”)
sql.sub!(/SELECT/i, “SELECT #{options_limit} * FROM ( SELECT ROW_NUMBER() OVER( ORDER BY #{options[:order] } ) AS row_num, “)
sql < #{options[:offset]}”
puts sql
sql
end
end
end
end

and in my controller I have:

sql = “select d.id,d.name,d.description,d.image1,d.image2
from disciplines d,disciplines_events ed
where d.delete=1 and
d.id=ed.discipline_id and
ed.event_id=#{@id} order by name”
@disciplines = Discipline.paginate_by_sql [sql, true], :page => params[:page], :per_page => 2

I have mislav-will_paginate installed as a gem…
Can you please tell me where am I going wrong???
Thanks..

By: Jeff Doyle

Jeff Doyle — Fri, 16 Jan 2009 15:33:57 +0000

Zeba - you need to provide the :page and :per_page args yourself. Try something like:

@results = Page.paginate_by_sql ["select blahs.* from ... where stuff=?", sql_arg], :page => params[:page], :per_page => 10

By: Zeba

Zeba — Fri, 16 Jan 2009 09:29:33 +0000

Hi..
I need some help..
Can you tell me how can I paginate on custom queries???
I tried paginate_by_sql and paginate_from_sql…
But both didn’t work… :((
Is there any way I can pass custom queries to the will_paginate plugin…???
Thanks in advance…

By: elise

elise — Wed, 13 Aug 2008 11:31:53 +0000

There is a way for ultrasphinx:
see http://blog.aisleten.com/2008/04/19/hacking-the-ultrasphinx-plugin-to-work-with-paginating_find/
basically a wrapper round the corresponding methods of will_paginate. Ultrasphinx doesn’t use will_paginate directly, but defines the same methods.

Also you need to apply the pagination (page_count etc) onto the search itself, not the result (since with ultrasphinx you create a search object and then run it to get results).

I recently switched to ultrasphinx, while still using above pagination. Ferret is just too unstable.

By: Ilya Grigorik

Ilya Grigorik — Sat, 09 Aug 2008 18:48:12 +0000

Richard, I think ultrasphinx is ‘will_paginate’ aware. Take a look at that plugin, it should be functionally equivalent and be easy to integrate.

By: Richard

Richard — Fri, 08 Aug 2008 02:42:59 +0000

Any ideas on how to work this plugin with the Ultrasphinx search plugin?

By: Ilya Grigorik

Ilya Grigorik — Sun, 27 Jul 2008 23:53:34 +0000

Owen, window_helper function should reside in the application_helper file, and the partial you can put in a ’shared’ directory, so you can reuse it in different models. Having said that, if you’re only paginating one model, you can simply put it in the same folder. Last but not least, take a look at the updated code Jeff has shared few messages below.

Jeff, thanks a lot for sharing your code!