Contents

# encoding: UTF-8
module MongoMapperExt
  class Paginator
    instance_methods.each { |m| undef_method m unless m =~ /(^__|^nil\?$|^send$|respond_to\?|proxy_|^object_id$)/ }

    attr_accessor :subject
    attr_reader :total_entries, :per_page, :current_page
    alias limit per_page

    def initialize(total_entries, current_page, per_page=nil)
      @total_entries    = total_entries.to_i
      self.per_page     = per_page
      self.current_page = current_page
    end

    def total_pages
      (total_entries / per_page.to_f).ceil
    end

    def out_of_bounds?
      current_page > total_pages
    end

    def previous_page
      current_page > 1 ? (current_page - 1) : nil
    end

    def next_page
      current_page < total_pages ? (current_page + 1) : nil
    end

    def skip
      (current_page - 1) * per_page
    end
    alias offset skip # for will paginate support

    def send(method, *args, &block)
      if respond_to?(method)
        super
      else
        subject.send(method, *args, &block)
      end
    end

    def ===(other)
      other === subject
    end

    def method_missing(name, *args, &block)
      @subject.send(name, *args, &block)
    end

    def respond_to?(name, *args, &block)
      super || @subject.respond_to?(name, *args, &block)
    end

    private
      def per_page=(value)
        value = 25 if value.blank?
        @per_page = value.to_i
      end

      def current_page=(value)
        value = value.to_i
        value = 1 if value < 1
        @current_page = value
      end
  end
end

Version data entries

4 entries across 4 versions & 1 rubygems

Version	Path
mongomapper_ext-0.5.2	lib/mongomapper_ext/paginator.rb
mongomapper_ext-0.5.1	lib/mongomapper_ext/paginator.rb
mongomapper_ext-0.5.0	lib/mongomapper_ext/paginator.rb
mongomapper_ext-0.4.0	lib/mongomapper_ext/paginator.rb