class Paginator
Constants
- VERSION
Attributes
count[R]
per_page[R]
Public Class Methods
new(count, per_page, &select)
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Instantiate a new Paginator
object
Provide:
-
A total count of the number of objects to paginate
-
The number of objects in each page
-
A block that returns the array of items
-
The block is passed the item offset (and the number of items to show per page, for convenience, if the arity is 2)
-
# File lib/active_scaffold/paginator.rb, line 21 def initialize(count, per_page, &select) @count = count @per_page = per_page raise MissingSelectError, 'Must provide block to select data for each page' unless select @select = select end
Public Instance Methods
each() { |item| ... }
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Iterate through pages
# File lib/active_scaffold/paginator.rb, line 44 def each each_with_index do |item, _| yield item end end
each_with_index() { |page(number), number - 1| ... }
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Iterate through pages with indices
# File lib/active_scaffold/paginator.rb, line 51 def each_with_index 1.upto(number_of_pages) do |number| yield(page(number), number - 1) end end
first()
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First page object
# File lib/active_scaffold/paginator.rb, line 34 def first page 1 end
last()
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Last page object
# File lib/active_scaffold/paginator.rb, line 39 def last page number_of_pages end
number_of_pages()
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Total number of pages
# File lib/active_scaffold/paginator.rb, line 29 def number_of_pages (@count / @per_page).to_i + ((@count % @per_page).positive? ? 1 : 0) end
page(number)
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Retrieve page object by number
# File lib/active_scaffold/paginator.rb, line 58 def page(number) number = [1, number.to_i].max Page.new(self, number) do offset = (number - 1) * @per_page args = [offset] args << @per_page if @select.arity == 2 @select.call(*args) end end