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Contents
module Godmin
module Resource
module Pagination
extend ActiveSupport::Concern
WINDOW_SIZE = 7
included do
helper_method :current_page
helper_method :pages
helper_method :total_pages
helper_method :total_resources
end
def apply_pagination(resources)
resources.limit(pagination_limit).offset(pagination_offset)
end
private
def current_page
params[:page].present? ? params[:page].to_i : 1
end
def pagination_limit
self.class.per_page
end
def pagination_offset
(current_page * self.class.per_page) - self.class.per_page
end
def pages
pages = (1..total_pages).to_a
return pages unless total_pages > WINDOW_SIZE
if current_page < WINDOW_SIZE
pages.slice(0, WINDOW_SIZE)
elsif current_page > (total_pages - WINDOW_SIZE)
pages.slice(-WINDOW_SIZE, WINDOW_SIZE)
else
pages.slice(pages.index(current_page) - (WINDOW_SIZE / 2), WINDOW_SIZE)
end
end
def total_pages
(total_resources.to_f / self.class.per_page).ceil
end
def total_resources
resources.limit(nil).offset(nil).count
end
module ClassMethods
def per_page
10
end
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems