MongoidSortable

Add this line to your application's Gemfile:

gem 'mongoid_sortable'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mongoid_sortable

class Book
  include Mongoid::Document
  include MongoidSortable::Sorting
  
  sortable_by :title, :created_at
end

@books = Book.all

# Generates ?order_by=created_at_asc or ?order_by=created_at_desc
# depending on current @book criteria order
sorting_link(@book, :created_at, 'Book Timestamp')

# Customize link
sorting_link(@book, :created_at, 'Book Timestamp') do |name, path, current_order, is_active|
  # Whatever you want to generate based on block parameters
end

By default, sorting link has html classes sorting_link asc/desc and active if sorting by that field is enabled now.

sortable_by :domestic_gross, :foreign_gross do |gross_type|
  "movie_details.grosses.#{gross_type}"
end

Using this with domestic_gross_desc, for example, generates desceting sorting by movie_details.grosses.domestic_gross_desc field. It can be used to get rid of long url parameters which reflects your internal document structure.

Also you can set block that will be used to generate sorting field for all parameters that don't match to explicit sortable_by

default_sorting do |param|
  "movie_details.#{param}"
end

So, for example, sorting(order_by: ticket_cost_asc) will generate query with ascenting movie_details.ticket_cost sorting.

Of course, you can add more complicated logic inside of sortable_by and default_sorting block, all that you need is to return string with field name.

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request