A class representing a paginator for an Active Record collection.

Methods
Included Modules
Classes and Modules
Class ActionController::Pagination::Paginator::Page
Class ActionController::Pagination::Paginator::Window
Attributes
[R] controller
[R] item_count
[R] items_per_page
Public Class methods
new(controller, item_count, items_per_page, current_page=1)

Creates a new Paginator on the given controller for a set of items of size item_count and having items_per_page items per page. Raises ArgumentError if items_per_page is out of bounds (i.e., less than or equal to zero). The page CGI parameter for links defaults to "page" and can be overridden with page_parameter.

[ show source ]

     # File vendor/rails/actionpack/lib/action_controller/pagination.rb, line 192
192:       def initialize(controller, item_count, items_per_page, current_page=1)
193:         raise ArgumentError, 'must have at least one item per page' if
194:           items_per_page <= 0
195: 
196:         @controller = controller
197:         @item_count = item_count || 0
198:         @items_per_page = items_per_page
199:         
200:         self.current_page = current_page
201:       end
Public Instance methods
[](number)

Returns a new Page representing the page with the given index number.

[ show source ]

     # File vendor/rails/actionpack/lib/action_controller/pagination.rb, line 249
249:       def [](number)
250:         Page.new(self, number)
251:       end
current()

Alias for current_page

current_page()

Returns a Page object representing this paginator’s current page.

This method is also aliased as current

[ show source ]

     # File vendor/rails/actionpack/lib/action_controller/pagination.rb, line 217
217:       def current_page
218:         self[@current_page]
219:       end
current_page=(page)

Sets the current page number of this paginator. If page is a Page object, its number attribute is used as the value; if the page does not belong to this Paginator, an ArgumentError is raised.

[ show source ]

     # File vendor/rails/actionpack/lib/action_controller/pagination.rb, line 207
207:       def current_page=(page)
208:         if page.is_a? Page
209:           raise ArgumentError, 'Page/Paginator mismatch' unless
210:             page.paginator == self
211:         end
212:         page = page.to_i
213:         @current_page = has_page_number?(page) ? page : 1
214:       end
each() {|self[n+1]| ...}

Successively yields all the paginator’s pages to the given block.

[ show source ]

     # File vendor/rails/actionpack/lib/action_controller/pagination.rb, line 254
254:       def each(&block)
255:         page_count.times do |n|
256:           yield self[n+1]
257:         end
258:       end
first()

Alias for first_page

first_page()

Returns a new Page representing the first page in this paginator.

This method is also aliased as first

[ show source ]

     # File vendor/rails/actionpack/lib/action_controller/pagination.rb, line 223
223:       def first_page
224:         self[1]
225:       end
has_page_number?(number)

Returns true if this paginator contains the page of index number.

[ show source ]

     # File vendor/rails/actionpack/lib/action_controller/pagination.rb, line 242
242:       def has_page_number?(number)
243:         return false unless number.is_a? Fixnum
244:         number >= 1 and number <= page_count
245:       end
last()

Alias for last_page

last_page()

Returns a new Page representing the last page in this paginator.

This method is also aliased as last

[ show source ]

     # File vendor/rails/actionpack/lib/action_controller/pagination.rb, line 229
229:       def last_page
230:         self[page_count] 
231:       end
length()

Alias for page_count

page_count()

Returns the number of pages in this paginator.

This method is also aliased as length

[ show source ]

     # File vendor/rails/actionpack/lib/action_controller/pagination.rb, line 235
235:       def page_count
236:         return 1 if @item_count.zero?
237:         (@item_count / @items_per_page.to_f).ceil
238:       end