Class: MongoBrowser::Models::Pager

Inherits:
Object
  • Object
show all
Defined in:
lib/mongo_browser/models/pager.rb

Constant Summary collapse

PER_PAGE = 
25

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(page, size) ⇒ Pager

Returns a new instance of Pager.



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# File 'lib/mongo_browser/models/pager.rb', line 9

def initialize(page, size)
  @size = size
  @page = if page.to_i <= 0 then
            1
          else
            [page.to_i, total_pages].min
          end
end

Instance Attribute Details

#page ⇒ Object (readonly)

Returns the value of attribute page.



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# File 'lib/mongo_browser/models/pager.rb', line 6

def page
  @page
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/mongo_browser/models/pager.rb', line 7

def size
  @size
end

Instance Method Details

#offset ⇒ Object 



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# File 'lib/mongo_browser/models/pager.rb', line 22

def offset
  (page - 1) * per_page
end

#per_page ⇒ Object 



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# File 'lib/mongo_browser/models/pager.rb', line 18

def per_page
  PER_PAGE
end

#to_hash ⇒ Object 



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# File 'lib/mongo_browser/models/pager.rb', line 34

def to_hash
  {
      size: size,
      page: page,
      total_pages: total_pages
  }
end

#total_pages ⇒ Object 



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# File 'lib/mongo_browser/models/pager.rb', line 26

def total_pages
  if size == 0 then
    1
  else
    (size.to_f / per_page).ceil
  end
end