48 lines
1.4 KiB
Ruby
48 lines
1.4 KiB
Ruby
module Kaminari
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module ActiveRecord
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extend ActiveSupport::Concern
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DEFAULT_PER_PAGE = 25
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included do
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def self.inherited(kls)
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# TERRIBLE HORRIBLE NO GOOD VERY BAD HACK: inheritable_attributes is not yet set here on AR 3.0
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unless kls.default_scoping
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new_inheritable_attributes = Hash[inheritable_attributes.map do |key, value|
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[key, value.duplicable? ? value.dup : value]
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end]
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kls.instance_variable_set('@inheritable_attributes', new_inheritable_attributes)
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end
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kls.class_eval do
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# page(5)
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scope :page, lambda {|num|
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per_page = @_default_per_page || Kaminari::ActiveRecord::DEFAULT_PER_PAGE
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limit(per_page).offset(per_page * ([num.to_i, 1].max - 1))
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} do
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# page(3).per(10)
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def per(num)
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limit(num).offset(offset_value / limit_value * num)
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end
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def num_pages
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(except(:offset, :limit).count.to_f / limit_value).ceil
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end
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def current_page
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(offset_value / limit_value) + 1
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end
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end
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# overrides the default per_page value per model
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# class Article < ActiveRecord::Base
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# paginates_per 10
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# end
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def self.paginates_per(val)
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@_default_per_page = val
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end
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end
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end
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end
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end
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end
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