ListSorting

Easily create links for sorting a list of records.

---

Requirements

Requires will_paginate

Example

Controller

class UsersController < ApplicationController
  def index
    @users = paginate :users, :order => 'login'
    # or
    @users = paginate @group.users, :order => 'login'
  end
end

View

Basic example

<th><%= sort_link('Login', 'login') %></th>

outputs

<th><a href="/users?sort=login">Login</a></th>

Multiple fields

<th><%= sort_link('Name', 'last_name, first_name, middle_name') %></th>

outputs

<th><a href="/users?sort=last_name%2C+first_name%2C+middle_name">Name</a></th>

Options

If the :default option is given, and the params contains no sort info (meaning this current list is sorted by the default order)

<th><%= sort_link('ID', 'id', :default => true) %></th>

then the link will be for the inverse order

<th><a href="/users?sort=id+DESC">ID</a></th>

Encoded Parameter

By default the sort parameter is plain; but if parameter encoding is desired, it can be set by setting 'encoded' to true anywhere in your code (probably in environment.rb)

ListSorting.encoded = true

Changing the encoding script

If you want to implement your own encoding script (by default Base64 is used), just replace these two variables with your own procs.

ListSorting.encoding_proc = Proc.new { |string| SecretLibrary.encode(string) }
ListSorting.decoding_proc = Proc.new { |string| SecretLibrary.decode(string) }

Sort Parameter

ListSorting uses :sort as the default key in paramsm it can be changed as follows.

ListSorting.sort_parameter = :s
# example url: 'users?s=bG9naW4g

---

Copyright (c) 2008 Jorrel Ang, released under the MIT license