Class: DmPagination::Pagination

Inherits:
Object
  • Object
show all
Defined in:
lib/dm-pagination/pagination.rb

Instance Method Summary collapse

Constructor Details

#initialize(collection, options) ⇒ Pagination

Returns a new instance of Pagination.



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# File 'lib/dm-pagination/pagination.rb', line 3

def initialize(collection, options)
  @page = (options[:page] || 1).to_i
  @per_page = (options[:per_page] || 10).to_i
  @proxy_collection = collection
  @collection = collection.all(
    :offset => (@page - 1)*@per_page, :limit => @per_page)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 



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# File 'lib/dm-pagination/pagination.rb', line 36

def method_missing(method, *args, &block)
  @collection.send(method, *args, &block)
end

Instance Method Details

#count ⇒ Object 



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# File 'lib/dm-pagination/pagination.rb', line 27

def count
  offset = (@page - 1)*@per_page
  [0, [@proxy_collection.count - offset, @per_page].min].max
end

#num_pages ⇒ Object 



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# File 'lib/dm-pagination/pagination.rb', line 15

def num_pages
  (@proxy_collection.count + @per_page - 1) / @per_page
end

#page ⇒ Object 



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# File 'lib/dm-pagination/pagination.rb', line 11

def page
  @page
end

#pages(window = 5, left = 2, right = 2) ⇒ Object 



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# File 'lib/dm-pagination/pagination.rb', line 19

def pages(window = 5, left = 2, right = 2)
  return [] if num_pages <= 1
  (1..num_pages).inject([]) do |result, i|
    i <= left || (num_pages - i) < right || (i-page).abs < window ?
      result << i : (result.last.nil? ? result : result << nil)
  end
end

#respond_to?(*args, &block) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dm-pagination/pagination.rb', line 32

def respond_to?(*args, &block)
  super || @collection.send(:respond_to?, *args, &block)
end

#to_json ⇒ Object 



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# File 'lib/dm-pagination/pagination.rb', line 40

def to_json
  @collection.to_json
end