Module: Pagy::GearboxExtra
- Included in:
- Pagy
- Defined in:
- lib/pagy/extras/gearbox.rb
Overview
Automatically change the number of items per page depending on the page number accepts an array as the :gearbox_items variable, that will determine the items for the first pages
Instance Method Summary collapse
-
#setup_items_var ⇒ Object
Setup @items based on the :gearbox_items variable.
-
#setup_last_var ⇒ Object
Setup Pagy @last based on the :gearbox_items variable and @count.
-
#setup_offset_var ⇒ Object
Setup @offset based on the :gearbox_items variable.
Instance Method Details
#setup_items_var ⇒ Object
Setup @items based on the :gearbox_items variable
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# File 'lib/pagy/extras/gearbox.rb', line 12 def setup_items_var return super if !@vars[:gearbox_extra] || @vars[:items_extra] gears = @vars[:gearbox_items] raise VariableError.new(self, :gearbox_items, 'to be an Array of positives', gears) \ unless gears.is_a?(Array) && gears.all? { |num| num.positive? rescue false } # rubocop:disable Style/RescueModifier @items = gears[@page - 1] || gears.last end |
#setup_last_var ⇒ Object
Setup Pagy @last based on the :gearbox_items variable and @count
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# File 'lib/pagy/extras/gearbox.rb', line 23 def setup_last_var return super if !@vars[:gearbox_extra] || @vars[:items_extra] gears = @vars[:gearbox_items] # This algorithm is thousands of times faster than the one in the geared_pagination gem @last = (if count > (sum = gears.sum) [((count - sum).to_f / gears.last).ceil, 1].max + gears.count else pages = 0 remainder = count while remainder.positive? pages += 1 remainder -= gears[pages - 1] end [pages, 1].max end) @last = vars[:max_pages] if vars[:max_pages] && @last > vars[:max_pages] end |
#setup_offset_var ⇒ Object
Setup @offset based on the :gearbox_items variable
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# File 'lib/pagy/extras/gearbox.rb', line 43 def setup_offset_var return super if !@vars[:gearbox_extra] || @vars[:items_extra] gears = @vars[:gearbox_items] @offset = if @page <= gears.count gears[0, @page - 1].sum else gears.sum + (gears.last * (@page - gears.count - 1)) end + @outset end |