Paginate an array

rubyonrails-talk
1

My controller code is as follows,

  def index   end

  def show     if params[:cat_id]     # cat_id is fetched from DB(a table with two columns id and name)     #mapped as cat_id in routes file       @articles = Article.find_all_by_name(params[:cat_id].gsub(/\-/, ' '))       render :action => :index     end   end

How to do pagination using will_paginate on this.

Here @articles is an array which fetches articles based on category names. The output of this is as follows,

An index page with 3 category names and relevant articles under each category. Now i need to apply will_paginate under each category in index page. How to do this. Adding ".paginate(:page => params[:page], :per_page =>3) returns undefined method 'total pages' since its an array. Could you please advise me as to how pagination can be done. Further, the url structure is article/categoryname/articlename (formed using slug).

2

Use where instead of the find_by helpers.

`Article.where(“name = ?”, params[:cat_id].gsub(/-/, ‘’)).paginate({

:page => params[:page], :per_page =>3 })`

find_all_by_* does it’s job literally, it finds them all and it defeats the logic in it’s name to add pagination to it. So if you want pagination use where.